Malicious PDF — malware analysis report

Static analysis result for SHA-256 74283d47443d82db…

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 10:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fee7341c3ff8406f0e0a7d0b74b96f28 SHA-1: 36df0e3b17a60e74121894c1f776c1085f49bba4 SHA-256: 74283d47443d82db6e803b8ddcbaa3964708052b1a7e075d5e10f194b45b54ec
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 helpful resource. This suggests a phishing or social engineering attempt to direct users to malicious content. The presence of numerous other links to Shopify PDFs, while individually benign, contributes to a link farm pattern, potentially for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=persuasive+essay+outline+template+middle+school
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/9141/1353/files/83391396608.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/5482492476.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/22103984990.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/96568046548.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/popinuliwevirat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/74299819682.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/avionics_certification_complete_guide_to_do_178_do_178c_do_254.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/38946547105.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/67424741792.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9174/files/bbc_english_at_work.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/unarchiver_for_mac.pdf
    • https://static.usrfiles.com/ugd/270e53_ab1c4523e37947718611f39f48668ffb.pdf
    • https://static.usrfiles.com/ugd/a474dd_1c5f3c084a7e445cb1128ce4f93c0807.pdf
    • https://static.usrfiles.com/ugd/b42fd6_46767bff0fd94b68872f9490bc26bd62.pdf
    • https://static.usrfiles.com/ugd/162fe6_3ff634d70bfb4a94b68b1e99181bea09.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_off000069ce.bin
956a3f2677463fb82fbd9b23225f6acafc522009f8fc0d78f26f1a70a30f9e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CE 5476 bytes
font_01_sfnt_off00007c51.bin
5a9a913cad1c020d90cbae1b4a035537f62a6b0ae72f32f68452a8201b52da0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C51 10048 bytes

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