Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0afd6475ad12a9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 21:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22c01a9f56be6d9b1e23bfa44985afae SHA-1: a4c7bf1df7b2af54ee52c80c5103b1ca777d1fc8 SHA-256: 6c0afd6475ad12a99479b788e6984c085b03698a22c21ae75288dbea5051bca6
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.com, which is likely used to obscure the final destination. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDFs, potentially for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt.

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=1st+grade+reading+comprehension+book+pdf
    • http://files.centerlinemovement.com/uploads/1/3/1/4/131438641/3685554.pdf
    • http://files.howardcountyschoolhealthcouncil.org/uploads/1/3/0/8/130874510/7205566.pdf
    • http://files.milwoodunitedmethodistchurch.org/uploads/1/3/1/4/131453015/zuvomedagupusa-rezugeki-xovoxu-xosolalof.pdf
    • http://jitod.carolinemiekinaillustration.com/uploads/1/3/0/8/130874493/jizoguj_jimazoxeduvitur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/teridogafuzavinuwavegifik.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/11607256019.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/99383944211.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9047/files/11721655978.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/pubevomabakifemitobefinot.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/pilokovarixawokasolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/50198493056.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/18604901793.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/jumosizozakejik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/fadowazikebeputilomoxat.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/intimacy_anorexia_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/gajaduvemugupiron.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/44173874076.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/19837548237.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_off0000691c.bin
7a34eae85dc3397241fe11dbc7a85ab1eea7473ae2822ad0c2964b345ba0e667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5700 bytes
font_01_sfnt_off00007c4c.bin
aec00c2a8ba5b881b44267814aa9794d7530000393b8a5c2997646140540e97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 10204 bytes

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