Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccf636780e6fe74…

MALICIOUS

PDF

117.6 KB Created: 2020-08-31 04:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeccede67482cdbb8edc89cbaeb613b3 SHA-1: 5e113a7aef0740495ed3d4887bda3fcb0e8dc737 SHA-256: 6ccf636780e6fe748454483561342a5bafe07f733aad4cc26f157604c380b728
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wix?keyword=el+planeta+delos+simios+confrontaci%2525C3%2525B3n+online`. This URL is likely used to redirect users to a malicious site for phishing or to download further payloads. The PDF also contains a large number of external links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/wix?keyword=el+planeta+delos+simios+confrontaci%2525C3%2525B3n+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/deep_ecology_and_ecofeminism.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/schlumberger_petrel_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/62020052463.pdf
    • https://cdn.shopify.com/s/files/1/0465/0139/6638/files/coins_and_prices_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/trustworthiness_qualitative_research.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_79fd9c7831bb46daaf91488ebb599ee5.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5379/files/8211715101.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/virginia_state_inspection_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/15367745273.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5493/files/81530800817.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/bufinugoritevetu.pdf
    • https://cdn.shopify.com/s/files/1/0454/4741/3910/files/chaconne_bach_busoni.pdf
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/dnd_attack_roll.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160ea.bin
6b1886100909a5777bb30fc7b7be00bba8ed48ad5f5b392b7a0cb4783a0739ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160EA 3016 bytes
font_01_sfnt_off00016ba4.bin
0c687a978b2edc5792803f706909841e5c0e3b1c996ba726818bab3a1097aa5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA4 5184 bytes
font_02_sfnt_off00017ce2.bin
9365c594c6ddfcc0f1442f56752412dfe72cbe1d7e25d1c42d7fd183589c4ffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE2 11724 bytes
font_03_sfnt_off0001a311.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A311 16092 bytes
font_04_sfnt_off0001b7d9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7D9 4324 bytes

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