Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1a8bc897fe5a07…

MALICIOUS

PDF

48.1 KB Created: 2020-08-06 06:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b2f933f8c3c92d1c4a7a070b08e4ca SHA-1: 10fdfa6812d343e4ea1cf216d5df0ad4bb476a39 SHA-256: 5d1a8bc897fe5a0717793a05c220395703402b3cb60fe2ccc3379f3dd0f71c14
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.cc, disguised as a Bonefish Grill menu. This suggests a phishing or malware distribution attempt. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content further. No scripts were extracted, but the PDF structure and embedded links strongly indicate malicious intent.

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/pify?keyword=bonefish+grill+menu+prices+pdf
    • http://files.armonklions.org/uploads/1/3/1/1/131163658/vixuxaruzi-wuvibikixo-tewiw.pdf
    • http://jenopi.kensawdustherapy.net/uploads/1/3/1/6/131637136/sarinomeguman.pdf
    • http://files.corneliusmullerproductions.com/uploads/1/3/0/7/130739802/478095.pdf
    • http://files.resonant-bodywork.com/uploads/1/3/1/6/131637658/wufefoxusideropav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5430/8257/files/92913545665.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/41362006956.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/24734910426.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/az_100_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/347399415.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/38465379808.pdf
    • https://cdn.shopify.com/s/files/1/0440/2210/4229/files/totodabibibom.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/sulezarajov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/21462878829.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/20182624453.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_off0000721c.bin
54a6f5e8ed5e55923987ddb0a6dc6a0d7b1087a9e1d3058146af6da4e6d52bfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 5408 bytes
font_01_sfnt_off00008467.bin
f25fc4fdb338b7672516d6a78e88202303c87fe08b78274436a71a2324d60cfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8467 15252 bytes