Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a3d0435516924f…

MALICIOUS

PDF

56.1 KB Created: 2020-08-18 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e6bc200ed5f09b355ada14c48453f88 SHA-1: b67b5f3e931e7fc4e7ca291f6913b2791efcbcae SHA-256: 61a3d0435516924f979daf25dc49fcfbe088c065c4e6631c351550ca7fbd976b
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.ru, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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.ru/pify?keyword=crazy+in+love+cover+sofia
    • http://files.pondviewmanor.net/uploads/1/3/1/4/131407088/bowezapivopudatute.pdf
    • http://roxizal.forevershizuka.com/uploads/1/3/1/4/131453293/976840.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/sewujuxonorefozuve.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/carpal_tunnel_syndrome_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/80894907228.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/university_calculus_alternate_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/chinese_to_english_translator_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/43456556240.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/vogomisugobawoponurefas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/funikatabomudej.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/totinobusexaturedepuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/figabaxibuvomanesijitevu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/html_and_css_code_for_website_design.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_off00009e5c.bin
a0021cd405bbf7cb08f1770c8d301f73ed43a04deb7363871668b443ebc019c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5C 4992 bytes
font_01_sfnt_off0000af79.bin
71ac829aaab05083325246019c1bb5c07dffdc5e28793d9d749eb35a70937094
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF79 10480 bytes