Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f2450510069ce1…

MALICIOUS

PDF

59.2 KB Created: 2020-07-31 07:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce5be63906b6c07b5d9b893d791e53e SHA-1: ef0e0cdbd153ae31174a120a695c8120d8cd1b2e SHA-256: 04f2450510069ce1150d05ca73f766e89e1c2ea8dc7a55525ae53515e2d70af9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference academic material, suggesting a lure. The presence of multiple external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the malicious redirector URL is a primary indicator of compromise.

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=calculus+early+transcendentals+7th+edition+pdf+solutions+manual
    • http://files.tenderdentist.com/uploads/1/3/1/1/131164281/lubafelijizapofami.pdf
    • http://files.literacywagoll.com/uploads/1/3/0/7/130739015/246892288.pdf
    • http://files.ubswpc.com/uploads/1/3/1/3/131397996/5557806.pdf
    • http://files.sathiavanee-veeramoothoo.com/uploads/1/3/1/8/131871891/jidutemepupaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/xorevijevuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/pulitinukujojebubitepukib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/limugotipisexilazakiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/26459342676.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/86653958352.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/wubew.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/sikoxub.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/munip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/12221233920.pdf
    • https://cdn.shopify.com/s/files/1/0431/4264/3868/files/piwunewibafisiwegesaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/xadifenexosesatulerarevu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8c4.bin
3a71bc3be5f3e35c6a9c969b3343b5fb3b71e4730e01a833cc8ea608b33407e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C4 5480 bytes
font_01_sfnt_off0000bb4a.bin
1f747d93bd31438c21b68debe22b07dbb5be39ae3344f71f94257920a8d8b0b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4A 10368 bytes

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