Malicious PDF — malware analysis report

Static analysis result for SHA-256 6767257d3b0b6593…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 01:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0c16fc1cc79f12d3141c473c06bd01b SHA-1: eb81a71427cc948e522d295f7caa745812de7af1 SHA-256: 6767257d3b0b6593f3122f2aa3962eefa5987e13a723263e06a872c59dbbc59a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.ru/pify?keyword=regulaciones+y+restricciones+arancelarias+y+no+arancelarias+pdf, points to known malicious redirector infrastructure. The document appears to be a link farm designed to redirect users to potentially harmful websites, masquerading as legitimate PDF resources.

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=regulaciones+y+restricciones+arancelarias+y+no+arancelarias+pdf
    • http://files.heikahaehaekupenga.com/uploads/1/3/0/8/130874121/5aea8af233.pdf
    • http://files.pirhonenconsulting.com/uploads/1/3/0/7/130775701/zikemosiwu.pdf
    • http://files.bondkitchens.co.uk/uploads/1/3/1/4/131438299/dokanasotutuxim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/xovikob.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/cours_analyse_2_smpc.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/twitter_logo_vector.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/javapurinotes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/vawido.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/triple_negative_breast_cancer_review.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/42394007180.pdf
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/burnout_among_social_workers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/naxigofu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/86608048238.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/wetabisonojur.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_off00005f8a.bin
1b1dbf31cab4959065148e5d2300605b61cbfc5e8c4c96c872dfe50a3ee355b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 5432 bytes
font_01_sfnt_off00007225.bin
050d8a110d0357645217d3c0bf9113d1b36940b7d362dca6f3fd50a480bf5b41
pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 10416 bytes