Malicious PDF — malware analysis report

Static analysis result for SHA-256 67677df8ba158b52…

MALICIOUS

PDF

49.9 KB Created: 2020-08-22 01:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00d1f66a2ae90cd621bdd0de82819e9 SHA-1: f050f576564d63d9b682fc0ac123b186d5ba80fa SHA-256: 67677df8ba158b52480c91ffd55cb5fd696381e8a492a09b1dd69b09fd3a6f0f
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 distribute further malware or phishing content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for search engine traffic. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or SEO poisoning 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.ru/pify?keyword=giorgio+agamben+pdf+espa%25C3%25B1ol
    • http://files.championsworship.org/uploads/1/3/1/3/131381021/33edf8fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/9882/8954/files/adamant_dragon_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/36485758283.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/74657097786.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/mazaromogezuvunagoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/20996862715.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/diabetes_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/summon_mob_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/98589520273.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/81856949493.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/jegadigijebubepijarezufut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/john_deere_x740.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/64634346278.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_off00008191.bin
48863fddfad2626ec682fd6a47782e6bc156e685d5c6a0e39a115905ddd72604
pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 5744 bytes
font_01_sfnt_off000094bd.bin
4ef60b72e1b48e375a25256bb98e7a6c00ebd38d5858bb9294fbcec20190a39a
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 10552 bytes