Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ad4ad027446991…

MALICIOUS

PDF

43.0 KB Created: 2020-09-18 16:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e2203e42c199858208c2d176ff9c3f SHA-1: d6f792974849bf745e478251c7aeeb522ba7e9d6 SHA-256: 10ad4ad027446991bd186d1178cb34897b6fc31a1f275d5fd4ce2e7439b5bf41
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The document body, though garbled, contains a URL that matches one of the extracted IOCs, suggesting an attempt to drive traffic to malicious sites. The presence of multiple PDF links points towards a coordinated effort to distribute content or malware through a link farm.

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.link/wix?keyword=pathfinder+kingmaker+caster+feats
    • http://sujuga.tntdeesign.com/uploads/1/3/1/4/131438500/2da31b1ca937.pdf
    • http://warof.innerhiking.com/uploads/1/3/1/8/131856373/gujufodifup_vixudolo_saximimoto.pdf
    • http://files.oasisnorth.org/uploads/1/3/1/4/131407227/xebuven-pewobexex-xotakokumabopex-baruz.pdf
    • http://wires.jacquelenebennett.com/uploads/1/3/2/3/132302912/a2d2f.pdf
    • http://files.sphsmagnet.com/uploads/1/3/1/0/131070178/9736429.pdf
    • http://fiposaw.atouchofclasshairsalon.ca/uploads/1/3/1/3/131379992/3281e04ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://484d0475-3526-4813-971c-edff588f7e21.filesusr.com/ugd/0ebc1f_8b162903de7b4e1c94d85a195439a7a1.pdf?index=true
    • https://3e7e0e77-057a-44e0-b935-c9122ee2b372.filesusr.com/ugd/7d1dc9_9bea0800b49d4ffc968b1a0fba205e8e.pdf?index=true
    • https://38e34c48-bb5c-48be-8c1f-a24771a81f13.filesusr.com/ugd/23b571_d772be0480b74e3b8f016da12d504295.pdf?index=true
    • https://b7835632-4217-4d8c-8fbb-cef36ed8f079.filesusr.com/ugd/b5472a_00c3cb7a2d03432485b44c94ef4bbe34.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/wubasebiwip.pdf
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/panchatantra_stories_in_telugu_free.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_off00006a05.bin
13d50072b389614169668231d535b83d970569586db64c97e55982cc9caf1b03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 5468 bytes
font_01_sfnt_off00007c7d.bin
407d216956fba6af4fd04f0c71040fb6913963d25d94e5adf1ef6b70308ef508
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7D 10280 bytes