Malicious PDF — malware analysis report

Static analysis result for SHA-256 1408d5ef4261dd65…

MALICIOUS

PDF

43.6 KB Created: 2020-09-02 16:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32fce884a3d07d5e99ca65cccf6a5141 SHA-1: 1c567b58bbc569769cd70c8926c5d9e997e13209 SHA-256: 1408d5ef4261dd65178a451fea60eaa7213bc93f25d5f411eb4866d6e1d9ebf8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a guide for Excel. This redirector likely leads to further malicious content or exploits. The PDF also contains a large number of links to external PDFs, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attack.

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.cc/pify?keyword=excel+remove+blank+rows+from+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/66016750092.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/xafewikirotetimaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/susatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2969/1558/files/blended_movie_in_dual_audio_720p.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/58374122197.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/pagerularap.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/98643697247.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_ce3540ee7280473892f79ec212604345.pdf
    • https://static.usrfiles.com/ugd/3649d2_419ca988ff4e4e319b073eebaac59bea.pdf
    • https://static.usrfiles.com/ugd/cec570_85bece38d4cb47fead0e0d1fd4ab5fc4.pdf
    • https://static.usrfiles.com/ugd/e4f6f0_5c1157ddd9f14f8198269de40e7ddcbb.pdf
    • https://static.usrfiles.com/ugd/f55bec_60e45a79057640dc8b2f409ce0c54219.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_off00005e7f.bin
75af0148b40dae5e5d8d157561c16245cf9c09dbd87e9643e63e05bc522766ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7F 5244 bytes
font_01_sfnt_off0000702c.bin
41cd98a33120e3a75c3ac16ef12bf6838a0f2b95750f7ff44e10f2549bce069e
pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 10300 bytes
font_02_sfnt_off0000936c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 4324 bytes