Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e11d5ab87c8760…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 02:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a706988c0e947a02dc0dc23aedda8372 SHA-1: ca33e4bfa0cfd9263b62f591d7393edd7cd76fc0 SHA-256: 01e11d5ab87c876064221e797ced1e35884269ea2166947d0885518c6cb95362
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying one leading to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this finding. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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=dante%2527+s+inferno+pdf
    • http://tedap.francesca-williams.co.uk/uploads/1/3/1/6/131636612/gepuz_mefugu_vuvor.pdf
    • http://files.thesouthernsaltymermaid.com/uploads/1/3/1/6/131606343/kibisajo.pdf
    • http://files.anotherplacecalledhome.net/uploads/1/3/1/4/131453024/8164776.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/sodoweb.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/39701529491.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/calculus_single_variable_8th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/27758844565.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/cheam_park_farm_primary_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/lopozutixebutipofafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/2150653108.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/joss_whedon_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/behavioral_decision_theory.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_off00006d59.bin
fa4f5ae61a7489eca6710e5f6cd49fbf75e62a85823ac18211db732befe681a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D59 5036 bytes
font_01_sfnt_off00007e8d.bin
9ac20c2a2e0537d02c8c90b260bc55773b7941d4d08c99ca2a1506564e435aec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 10224 bytes