Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b9e197ab48639a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-29 12:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9592e0cb9f0d6d9687d3c0ae44dca9 SHA-1: 8c8d79e258327501df37d37f23db1ac4cb162408 SHA-256: 78b9e197ab48639acd17ba280c462b43a862014754639e14b01b2791fa5b9fc1
154 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to a redirector service, indicating a link farm or phishing attempt. The embedded URL `https://ttraff.com/wix?keyword=mike+matthews+bigger+leaner+stronger` is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or scam purposes.

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/wix?keyword=mike+matthews+bigger+leaner+stronger
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_b8e4ae36c5374a73b9f1ceb5e9ffd61c.pdf
    • https://static.usrfiles.com/ugd/b8c837_211b042e00ef4f7db3cbe1061efb60dd.pdf
    • https://static.usrfiles.com/ugd/6846fe_93d49e8216a042d9bb38a17714c291fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_66def0301fec4b8982a9bcd60fb46537.pdf
    • https://static.usrfiles.com/ugd/b8c837_8cbc298bdd8a495fa3718efcc5ddf459.pdf
    • https://static.usrfiles.com/ugd/b8c837_788ddd614c0f456ebacbb561db77c414.pdf
    • https://static.usrfiles.com/ugd/b8c837_c365ef63ac3a4dc3a3093827b0de7f60.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9378/files/carbonate_petroleum_reservoirs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/vofabuzudulodewakumewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/watawasiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/nebotamerex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/vebekazu.pdf
    • https://static.usrfiles.com/ugd/b8c837_e11e319da3e944ceb21665370faddd39.pdf
    • https://static.usrfiles.com/ugd/b8c837_b90e4a62881044ae934dcef21ec63742.pdf
    • https://static.usrfiles.com/ugd/b8c837_db5f5f67406c4d4aa9ebcdbcbc81505c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f5bd3672fd04c2cb623c5c4069d3481.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_off000077f6.bin
9c0d32cb6b37479745a04725f2f550a0e8fd005705dd109d842bbcad653ae033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F6 5400 bytes
font_01_sfnt_off00008a46.bin
75164e78d36576df05049d34a9554626e682a799c2131616b96960b1978f7017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 11112 bytes

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