Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e56812faba83b25…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 02:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322017592c1820d32fc4093311fc4ec6 SHA-1: 45a4ff294997086923785766da95e449d9bcc65e SHA-256: 6e56812faba83b25a34fa9328e4e50a7bd4a4577e4d830b0478060c364b7227b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a link farm designed to generate traffic. One prominent link redirects to a malicious infrastructure at ttraff.ru, likely serving as a lure for further malicious activity. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL supports a phishing or scam 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=generation+z+age+range+pdf
    • http://files.plympton-wyomingfair.com/uploads/1/3/1/4/131409024/6791246.pdf
    • http://bemoxipob.deniseturu.com/uploads/1/3/1/4/131408100/1930318.pdf
    • http://files.ledgestonecondominium.com/uploads/1/3/0/8/130813764/kurabowirepofif.pdf
    • http://files.saintgregorys.org/uploads/1/3/2/6/132696117/fepavidapofoze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/atresia_colon.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/mystring_class_c.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/zanekubofanupiwemuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/4551096344.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/maine_state_inspection_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/kundalini_yoga_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/autonomous_learning.pdf
    • https://cdn.shopify.com/s/files/1/0436/4032/4256/files/kexibizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/broadcast_media_advertising.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/79693595811.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/magometixofow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/xorevijevuda.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_off00006542.bin
318cbcf1fb934e16dfa8b45526e445b2e435254197cb91c267df41309add4627
pdf-font-stream PDF embedded font (sfnt) at offset 0x6542 5080 bytes
font_01_sfnt_off000076a8.bin
f20251c9e15f197e710355c1efb2237c669484f798e4c5551b3a986d18274607
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10196 bytes