Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f6e5e6e58d2b17…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 15:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ebc98610efe6a660797978ea4440b5 SHA-1: a20a1567fea29f1edfb116c728e8f899cbfcc574 SHA-256: d7f6e5e6e58d2b17157f397892dfe6d4f2a45d7840dbce6c5d04c994243554a7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high number of embedded external links, a common tactic for link farms designed to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/pify?keyword=apache+poi+pdf+to+ppt', is identified as a malicious redirector. The document body contains garbled text but also includes the same URLs, reinforcing the link farm attack pattern. No scripts were extracted, but the sheer volume of links and the identified redirector strongly suggest a malicious intent to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=apache+poi+pdf+to+ppt
    • http://totoxax.jenniferepatterson.org/uploads/1/3/0/8/130814297/6422947.pdf
    • http://wezegi.middletonreview.com/uploads/1/3/2/6/132681513/583d08ee8e83.pdf
    • http://matigol.visionplus.org/uploads/1/3/2/8/132814930/tixomazawasudojut.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/gaxejoluroparajovisateduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/ritabizivanoliwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/kizejo.pdf
    • https://cdn.shopify.com/s/files/1/0447/4866/9079/files/58926306497.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/what_headsets_work_with_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/zekewobomatezalinewagus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/etika_menggunakan_media_sosial.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/35694299044.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/accountant_experience_resume.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640a.bin
e267c88646d6ee8bd549e3b2dde1476fbe6432c41e9ce5bfa1f0e3743a2c4841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 4928 bytes
font_01_sfnt_off000074c7.bin
9b6204ac775b67eddb688a105f2409a1bd03556d912e38a1b55defa058f9b9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 10136 bytes

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