Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d1277fe94f2c6f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 09:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb67e2829ad2912937005bf0878dfd1 SHA-1: 7932035c14672ad64a5121440aa995094cefd871 SHA-256: 15d1277fe94f2c6f0ab8fa79413ced2d95667fcfe8a5b23f9c7e5d5a3095f2c8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though partially corrupted, contains the same URL, reinforcing its malicious intent. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate a malicious document.

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=third+grade+eog+practice
    • http://files.pensvault.com/uploads/1/3/0/7/130738722/993e07.pdf
    • http://gozef.aayogaandwellness.com/uploads/1/3/1/4/131454215/f86768f5ace2.pdf
    • http://files.hartwoodnorthfarm.com/uploads/1/3/1/4/131453945/ropujovegowi-jejabate-jogasemumuzebed-tarunusunofaxad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/mathematical_analysis_t._o._m._apostol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/26500983588.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/kibeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/rakisipujiras.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/46802249152.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/gewaderogeti.pdf
    • https://cdn.shopify.com/s/files/1/0438/6462/1216/files/wixanewavude.pdf
    • https://cdn.shopify.com/s/files/1/0447/1426/2682/files/befimekoguse.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/wodarulasasilevinujiwavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/sobuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/71389983527.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/basic_accounting_mcqs_with_answers.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_off0000631b.bin
3017be8f123fa7596b51aa67997f5e307da8572793968389a04a74ec8e7d0298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 5072 bytes
font_01_sfnt_off0000744e.bin
36e530a01fd9c3b8513f533a8e79cdde800b69bbe011d5a936229e5c17475c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 10108 bytes

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