Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f28eb69ea10db16…

MALICIOUS

PDF

59.3 KB Created: 2020-08-30 15:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20109907b189c94e4dd06e2de90e9f13 SHA-1: 9b3f0b9443364ec0067e85bb7dfcfabbf91d20ce SHA-256: 5f28eb69ea10db163f7dd1e89958668d1b5866543929c837a5d13af32d764130
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/wix?keyword=carlos+eduardo+robledo+puch+gay'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other links to Shopify PDFs indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent.

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/wix?keyword=carlos+eduardo+robledo+puch+gay
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/gmo_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/character_creator_3_pipeline.pdf
    • https://cdn.shopify.com/s/files/1/0436/1263/5298/files/99591104197.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/disaster_recovery_playbook_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5389/1232/files/applied_combinatorics_alan_tucker_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/xawirofagapeziwukut.pdf
    • https://cdn.shopify.com/s/files/1/0450/2142/9924/files/beloved_oxford_english_version.pdf
    • https://cdn.shopify.com/s/files/1/0464/7242/9718/files/41253127953.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/ritexevitiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/totemazabusalosifun.pdf
    • https://static.usrfiles.com/ugd/b8c837_decd755ffaf740bcaa3f681a02f97f30.pdf
    • https://static.usrfiles.com/ugd/5b604d_e684ee515d5c467c83dde573df8f7590.pdf
    • https://static.usrfiles.com/ugd/0b46e6_32a40d61f3b6461288ba4f8c0310889f.pdf
    • https://static.usrfiles.com/ugd/c1de29_898556ec09d442c8adbd2dce285967c6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/adding_and_subtracting_fractions_foldable.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/level_order_traversal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/nasiped.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_off0000aac6.bin
7ddb92d243e6ecfeff5d47fc3f81a302f34bfdb5f6ebab1327295c1ce1c23849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC6 5484 bytes
font_01_sfnt_off0000bd5f.bin
f6341c56a59a0424799f729ad772a9b822137bf6096056c71cece7ba9d7341c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5F 10156 bytes

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