Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e79fce2eb85093e…

MALICIOUS

PDF

56.5 KB Created: 2020-08-11 06:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1934b59cd789e59ed663e69a7ca924b4 SHA-1: 14b395b14b235e30985b0208ae2243c9a573510f SHA-256: 6e79fce2eb85093e7d9b65c6b3dc9e0345c75ec8c381afdf15633ecd61c0d444
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes a URL that matches the redirector heuristic, suggesting a link farm or SEO poisoning tactic. The presence of a password-protected archive lure heuristic indicates an attempt to obscure malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=barreras+de+la+comunicacion+pdf+unam
    • http://sokev.emw-d.com/uploads/1/3/0/8/130874429/koteluguxu.pdf
    • http://saxiteji.rabbithillhome.com/uploads/1/3/1/0/131070500/fimasogidirok.pdf
    • http://madolava.xiaoyanglong.com/uploads/1/3/1/6/131606027/3906040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0587/8173/files/94464285891.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/tofimovanuzusobidujefigag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/23137533400.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/60385052558.pdf
    • https://cdn.shopify.com/s/files/1/0434/0822/8508/files/69793127254.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/xamet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/feduruzivasisazedetuvuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/48825323232.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/importance_of_case_study_design.pdf
    • https://cdn.shopify.com/s/files/1/0438/5321/7952/files/14734864371.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/kasivivogimasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/dragon_ball_z_episode_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/gavemoni.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_off00009b3f.bin
c0ce6fa2c7b1b5d1c0835ac42793bc628ab1cd06f48977e8332ea5a62845405e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3F 5348 bytes
font_01_sfnt_off0000ad53.bin
019109206495b22fd5a4a684fabda3cfd083e85a67396d1aa704086de3691b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD53 11964 bytes

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