Malicious PDF — malware analysis report

Static analysis result for SHA-256 878377c82ac65336…

MALICIOUS

PDF

133.4 KB Created: 2020-08-07 09:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae03a94a1e5939e242c5d77a195efc3c SHA-1: a8f81573310ee2254f96019763ba024707bd0fdb SHA-256: 878377c82ac653364e08ade070229624a71b9636564af0d4e674c81a672143f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL and keywords that likely serve as a lure for users searching for software development principles. The presence of numerous external links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=agile+software+development+principles+pdf
    • http://files.swanseaspeechandlanguage.co.uk/uploads/1/3/1/0/131071067/7304079.pdf
    • http://files.stroke.global/uploads/1/3/1/8/131858540/tagubujivolifuxune.pdf
    • http://files.truenorthcommunitychurch.com/uploads/1/3/1/4/131483009/fbde58235.pdf
    • http://vixiradiz.animalmagicminizoo.com/uploads/1/3/0/7/130775934/salalinesolobu.pdf
    • http://files.cjeilearn.org/uploads/1/3/1/6/131607635/gikijukipu-zonanorogup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/xafoxamaxewetit.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/house_md_session_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/degowinis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/ruxovenabeposumeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/arduino_uno_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/7645219467.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/adobe_reader_convert_to_word_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/powerhouse_an_intermediate_business_english_course.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/demexakuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/54787122349.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/pikinagugipimariroke.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/pukesomasobenepizekozanid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/indian_surnames_list_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/77085595116.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHong
    • http://www.geocities.com/dnhhng
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org

Extracted artifacts 13

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_013_off0001bd26.bin
dc8a23be354b467a485ed729fd48e67370e6de81d3986f6df00ce837ddfd7149		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BD26 18200 bytes
font_00_sfnt_off000120b7.bin
3d232c5a1ee188fae540dc621a7c508dfb4407c49bdfc07303360a9f51ede396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120B7 5588 bytes
font_01_sfnt_off0001343d.bin
936299ab2d6bf8c72da51fef374338a7b98af214b8de5870bcfbf44480b90d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1343D 5616 bytes
font_02_sfnt_off00014763.bin
ff8289fcab20b7b81f5dc7c47458689637225d7099c48932a46d6898d6123f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14763 2656 bytes
font_03_sfnt_off00015264.bin
ff18c81e36cb9b15efdbce47b580caf324ee17e344593362339bc7644b00bcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15264 4544 bytes
font_04_sfnt_off0001606b.bin
5fd53e2058c4f5d98b70161d670f1e42036942552fef68ac845a5e47e2d7f715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1606B 2604 bytes
font_05_sfnt_off00016b4c.bin
5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B4C 3840 bytes
font_06_sfnt_off0001795a.bin
5fc9e2cd4e7ad04544edda2023dd698132b65daf167a61e09de9fd8de66d8b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1795A 2108 bytes
font_07_sfnt_off00018325.bin
593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18325 6640 bytes
font_08_sfnt_off000194c7.bin
772225a936e5a4eb4a1dbd5f45c76e505ab0996266e9db8871e4301c7e5a0c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194C7 11960 bytes
font_10_sfnt_off0001da25.bin
2966e90c9dd054503e3de22a5a5408e0fece8a475fc1df4191bcd6578de0767d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA25 3848 bytes
font_11_sfnt_off0001e8fd.bin
b7234fe71340c251e6f82b4d8404a7d2208cb7378ed16919237da316d5d9bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8FD 4356 bytes
font_12_sfnt_off0001f76d.bin
89aa5ef39ecd647c310fa7d43209dd0d208a608e38381102f2e40635d4f29b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F76D 2608 bytes

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