Malicious PDF — malware analysis report

Static analysis result for SHA-256 003304ad8ba15cd4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-20 07:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a672ee987133ac73d97059500dd04517 SHA-1: 0c62ae2a50325402e4125ddf31e9456fe2db15b0 SHA-256: 003304ad8ba15cd438405a5d45d3dc670dad9e2b512ac11098c6e11d828b6ce9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as malicious due to its inclusion of a link to known malicious redirector infrastructure. It also functions as a link farm, containing numerous external links, many pointing to Shopify-hosted PDFs, likely for SEO manipulation or to obscure the malicious redirector. The document body and embedded links suggest a deceptive lure, masquerading as a workout chart to mask its true malicious intent.

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=gym+biceps+workout+chart+pdf
    • http://posixub.newmtmoriahamejax.org/uploads/1/3/0/9/130969284/3187772.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/vex_robotics_iq.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/kekevitegadomowogixi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/probability_theory_and_mathematical_statistics_fisz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/pulamap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/noxanomef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6981/6478/files/26_as_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/96791886231.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/meerdere_bestanden_samenvoegen_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0461/9616/2711/files/6905404296.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_off00005d04.bin
af2430a9538d43002b963f9da0ff3266c594158d08eaad2a73396460c2c9c443
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D04 5792 bytes
font_01_sfnt_off000070b1.bin
14d949497fcb424a319dfe1f44d55a09ac9bf381fb20997d33e02dd81d19f183
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B1 10008 bytes