Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ae879ce77187be…

MALICIOUS

PDF

49.3 KB Created: 2020-08-27 20:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f4df5398fe6819dc9b98ab28347386d SHA-1: c920592a567c5ba4edc434f5f796a05e8777fe5f SHA-256: 08ae879ce77187be1ab740a143f8305dda61dae23e65d1058bacc2ad05a9c5c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword related to restaurant operations. It also hosts a large number of external PDF links, many of which point to unknown domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection 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.com/pify?keyword=restaurant+operations+manuals
    • http://daluzu.viciwreford-sinnott.com/uploads/1/3/2/8/132814989/1879116.pdf
    • http://files.spencerhdesign.com/uploads/1/3/0/8/130874554/gegibunakib.pdf
    • http://xafazusil.humberantislave.com/uploads/1/3/0/8/130814471/c286559df544.pdf
    • http://jateno.rhemayoga.com/uploads/1/3/0/7/130739561/fiwarurumorut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/back_bonding_concept.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/rugowew.pdf
    • https://cdn.shopify.com/s/files/1/0439/6630/0318/files/90445481019.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/79920095723.pdf
    • https://cdn.shopify.com/s/files/1/0436/8026/8438/files/separador_de_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/elements_of_electromagnetics_sadiku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/39808777483.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/57379645311.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/freeing_evil_dave_quick_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/factoring_polynomials_worksheet_kuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/9115/6380/files/gofivilufekug.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_off000078fb.bin
07a031db463f82f22844b3314b3ee30ab57f43d1375edf6a8cb129fb424e8e6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 4972 bytes
font_01_sfnt_off000089cd.bin
d42fd9b9e11b643975f80b452e54c6455abb2ca4fa4016870a92ed11e59a50d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 15092 bytes