Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9450351b5eb286…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 15:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2339ae8a6c78e91ca8e4f94ee8c4257b SHA-1: 3f93049791bd46c76aef9d5e1ed548c899dc39fd SHA-256: 7c9450351b5eb2861698319263e1a1a0c18850ff29da50acb19f6429540d1da5
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a 'Haynes manual online review'. The document also features a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or redirection attempt.

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/wb?keyword=haynes%20manual%20online%20review
    • http://batofa.teachingprimarymaths.com/uploads/1/3/1/8/131856158/d775a40159.pdf
    • http://files.marketconsultantsonline.com/uploads/1/3/1/4/131453206/virubuzu.pdf
    • http://files.elizabethdelormedesign.com/uploads/1/3/0/7/130739369/delumilanufovo_nurez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/sevizujivubatot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/asvab_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/discord_eyes_gif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/28803761283.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/artisan_bread_in_five_minutes_a_day_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/98694206925.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/85986298653.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/44061629974.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/6730934030.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/71510435290.pdf
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/physics_james_walker_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/autocad_import_text_issues.pdf
    • https://cdn.shopify.com/s/files/1/0437/8211/1381/files/thesis_abstract_format.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_off000066e7.bin
8f28abb19942147748aa209ed5f37caac5da84a861c0cd1955203717f2eba660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 4848 bytes
font_01_sfnt_off0000774f.bin
fea27569603bb58769eb11f0442bed303ac8bc3155006f01becd7451300593d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774F 10220 bytes
font_02_sfnt_off000099f0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F0 4324 bytes

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