Malicious PDF — malware analysis report

Static analysis result for SHA-256 607992bf36acd020…

MALICIOUS

PDF

42.5 KB Created: 2020-08-21 23:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd6b8cd6d96ace25cb7d87f90762e01 SHA-1: 6a8be3c97b50b28813e28a1031114ae11d826984 SHA-256: 607992bf36acd02061a8bb2308ff7b9eb32a745d52fbd1d0c663acadf33135d6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely as part of a phishing or scam campaign. The ML classifier strongly supports the malicious verdict.

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=depeche+mode+live+bootlegs
    • http://files.positivegundogsmn.com/uploads/1/3/1/3/131380471/9407882.pdf
    • http://pafibetut.menehunebasketball.com/uploads/1/3/1/1/131163599/lewutupimubozewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/59363142195.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/ib_biology_review_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/fuzopenufozanaduj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/linux_admin_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/anion_and_cation_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/73202668422.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/gasuboxeneforu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/physical_science_grade_12_experiments.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/panabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/80138646689.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/96196390733.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/54845130335.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/43883400356.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_off000059e1.bin
724f837c480fe88df8fca4f2d0de96bb865fa790a8c52501dd6ae2d00bb2b91f
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 5380 bytes
font_01_sfnt_off00006c1b.bin
acd1b7205e1b6bf92868db0e5e8dc3ee81a29df1edeeb60ce398f0969458f5ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1B 15412 bytes