Malicious PDF — malware analysis report

Static analysis result for SHA-256 630b89438bb987d1…

MALICIOUS

PDF

39.6 KB Created: 2020-08-28 00:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74d00bc8befb2efac8ffc8466d3947c5 SHA-1: 40d5babc66268e2c7bbb076d678e32d4fb194f5d SHA-256: 630b89438bb987d113dc04af3cafc889a2ce87e324480fd83620dec376ac616e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic with numerous Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded link structure and redirector indicate a likely attempt to lead the user to malicious content or a phishing site.

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=spader+rv+flat+rate+manual
    • http://mizopagez.beardedbomb.com/uploads/1/3/1/0/131070894/tikavoliz.pdf
    • http://parok.tucocheaescala.com/uploads/1/3/1/3/131379830/rikozi.pdf
    • http://files.amenfordesign.com/uploads/1/3/0/7/130775331/pibujim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0443/9290/6918/files/mystery_case_files_13th_skull_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9587/files/nerotozokuwuga.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/gungeon_knife_shield.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/takapisil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/civil_engineering_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/ripedi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/sketch_3_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/fufasunisizabivamifesi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/21225095932.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/96809769103.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/6085524982.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_off00005d39.bin
767c2ee913138c02de89baed510fc4888e85d44d7a13e4cf3c9a11e63ef4add9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D39 5172 bytes
font_01_sfnt_off00006ec4.bin
2739303439d1ce053b66a42212c0c8b1a7303bf677c8dd1e7b54bbf4b44a3004
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 10244 bytes