Malicious PDF — malware analysis report

Static analysis result for SHA-256 079d7626cb77c461…

MALICIOUS

PDF

52.3 KB Created: 2020-09-20 08:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fe3db9424b77ad4a72d826592eb3dfa SHA-1: 2282699a0070321879661d4fe42250c7225d0c86 SHA-256: 079d7626cb77c461ac307563d1ad5da365c61f5e267041bebd8807700132398d
162 Risk Score

Malware Insights

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

The PDF contains a lure for popular media content ('Arjun reddy tamilrockers download') and a visual download button, directing users to a malicious redirector. The document body also contains numerous links to external PDF files, many of which are hosted on suspicious domains, indicating a link farm designed to distribute malware or lead to phishing sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=arjun+reddy+tamilrockers+download+in+tamil
    • http://kuxiro.miweddingpainter.com/uploads/1/3/2/8/132815806/7847985.pdf
    • http://files.alutradellc.com/uploads/1/3/0/7/130775997/gatojowi_gejofatunofiro_konatifun.pdf
    • http://pujuxi.nimngroup.com/uploads/1/3/1/3/131383609/polajoxabujepane.pdf
    • http://files.sos22.ahsc-nm.org/uploads/1/3/0/7/130738569/6329131.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/namabesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5196/files/websites_without_http.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/temibomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/95133582882.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/rebeccas_office_porn.pdf
    • https://cdn.shopify.com/s/files/1/0436/9829/0856/files/lopisumeni.pdf
    • https://cdn.shopify.com/s/files/1/0463/2847/9906/files/broadsheet_reusable_coffee_cup.pdf
    • https://cdn.shopify.com/s/files/1/0459/6075/7407/files/80380005861.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/todakigoviraw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/antrenmanlarla_geometri_2_zmleri.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/beehive_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/52502266682.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/node_js_tutorial_for_beginners_step_by_step.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006883.bin
6b9aecd88d94819aac7531ff27fe81548d4c8b0a0e36d85340055c6e0b2b1db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 5292 bytes
font_01_sfnt_off00007a7a.bin
953e3c495f24e6ede8086fa2718281159584c95829caf8d358189c1fb25a2f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7A 11640 bytes
font_02_sfnt_off00009ffa.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFA 16164 bytes
font_03_sfnt_off0000b511.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB511 4324 bytes

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