Malicious PDF — malware analysis report

Static analysis result for SHA-256 07406170839225c0…

MALICIOUS

PDF

57.1 KB Created: 2020-07-30 17:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2ee45a5e5990be8e91728f807da381 SHA-1: 83f6edecc95bb216d152c088dda3f10b6ddedbc4 SHA-256: 07406170839225c048148f6b77d77382ae679a612ec0a365de58695c73dd099a
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 `ttraff.com`. This URL is likely used to funnel victims to malicious content or phishing pages. The PDF also contains a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=brabu+result+2020+pdf+download
    • http://files.marcellusroyaltyaction.com/uploads/1/3/1/1/131163684/julitoru_mitumudej_xusize_juwujegixuvoseg.pdf
    • http://files.aprilsandersphd.com/uploads/1/3/1/3/131383657/zopuwom.pdf
    • http://files.njpacci.org/uploads/1/3/1/1/131163898/vinenas.pdf
    • http://files.annadangerfield.com/uploads/1/3/0/8/130814666/612de2fb44ae9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/66084847637.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/tezetalujerifewafufana.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/92631589513.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/33804122169.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/melafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/29456704338.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/85107796428.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/jutuwamexutewamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/gimapevuxefikomofefuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/20784737907.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/42097693230.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008070.bin
3af682ea0ae801f7f8d51d1d285cf4334ce76c67d03d9a2f2032ac7b495147b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 5424 bytes
font_01_sfnt_off000092fb.bin
c10f7cf00695cea708bedc689b97db94392374942c5d271a3bc2c09add4d0c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92FB 10476 bytes
font_02_sfnt_off0000b70a.bin
e0eef67318eb21b27badf8614933f466e8b2bb18f7b308f32609acf6fe0972d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB70A 10104 bytes

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