Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4feaec3edb5f8bb…

MALICIOUS

PDF

33.9 KB Created: 2020-08-13 22:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5eb0c32c871675cff9c249658515daf SHA-1: e118aa3d415ad96cd4f810ff95d4159fe1974cec SHA-256: e4feaec3edb5f8bb475fe592346f86bcff74f41ca10862d8bba1b8730bd9032c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with the primary redirector URL being https://ttraff.com/pify?keyword=network+now+a1+starter. This indicates a likely attempt to lure users to malicious content or engage in SEO manipulation. The ML classifier strongly supports the malicious verdict.

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=network+now+a1+starter
    • http://files.anastasiaabboud.com/uploads/1/3/1/6/131636570/9288779.pdf
    • http://files.chelseaforbrook.com/uploads/1/3/1/4/131407635/6052295.pdf
    • http://files.almightyfitness.org/uploads/1/3/0/7/130775997/058863c9.pdf
    • http://files.casaesperanzalongmont.org/uploads/1/3/1/4/131453397/fe9eff50212a5.pdf
    • http://files.guycockrum.com/uploads/1/3/1/4/131437157/jakojodedegifukasaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8171/files/lasirizonaxarix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/71667419342.pdf
    • https://cdn.shopify.com/s/files/1/0438/1576/4128/files/66689277955.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/riposulodobewamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/2295537166.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/fezozupoteri.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/71395812600.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/jovexipujezonotazaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/kixegulurajifonupazujev.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/gloomhaven_house_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/absorption_and_marginal_costing_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/8190927503.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0a.bin
e9e4f3867b2923824f3f017ef81658fa57de43626098473c25dc8ffde336ca29
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0A 4824 bytes
font_01_sfnt_off00005a9f.bin
7f61828353f097df54d128ab983a058015db45052923183fc598af4ed363bcfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9F 9488 bytes