Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caf66fa2c0b777f…

MALICIOUS

PDF

50.9 KB Created: 2020-08-31 11:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d20eff2a0c8dce23cb796010f85986b7 SHA-1: 69daf2654aab24b305c3e972de99a7ac1a211bac SHA-256: 6caf66fa2c0b777f4cd12e631c0f99a3c0ca4af199125609e49ebbba0ed4e0ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://ttraff.cc/wix?keyword=the+metabolic+factor+quick+start+guide, is likely part of a phishing or scam campaign. The ML classifier also strongly indicated maliciousness.

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=the+metabolic+factor+quick+start+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_9924ba6f3a9b4606930d5e5cfdb9bdef.pdf
    • https://static.usrfiles.com/ugd/71fd01_31f916b1eec44061ad87facb43efb90b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7163694d3c2420f8f09a255e1cdfa80.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cf56285cd4a44e882650d09c1ae1373.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/50833362345.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9378/files/ap_intermediate_zoology_textbook.pdf
    • https://static.usrfiles.com/ugd/c20ea7_f1ac804c596146449142e1cf316b3d48.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ad59fc866ff4e858b567efd411cb048.pdf
    • https://static.usrfiles.com/ugd/50c35f_a30e0e5becc1460a82ce9d68fd479405.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e7badc137c433c9697aaf95c72375f.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_off0000865d.bin
91ec07d0888c2149d906799f9ca191de5394a37e8a8cf73ddb7d3327c58af5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x865D 5712 bytes
font_01_sfnt_off0000999a.bin
5384be6ee943194f581049464472c61ccec725dbfed90e216675b4c2ba05fb92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999A 10912 bytes

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