Malicious PDF — malware analysis report

Static analysis result for SHA-256 7425c792905c67d3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 13:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 446fb50ae20798b1d8612096b1de4714 SHA-1: aabc5b9b2bf3c6b782b9ccc0eefabd0e9183be82 SHA-256: 7425c792905c67d3336158c43a10e8047ac1c498b5121d77d2a2bf95c8060a21
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Imca dp logbook guidelines' and the malicious URL, suggesting a lure. The presence of many Shopify links indicates a link farm, a common tactic for SEO poisoning or distributing malicious 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/wix?keyword=imca+dp+logbook+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/86068377744.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/come_tingere_le_uova_con_colorante_a.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/92387425046.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/nepuxixepamilinabun.pdf
    • https://cdn.shopify.com/s/files/1/0443/0076/3292/files/bitusexopub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/33945257651.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/39584896328.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/financial_reporting_manager_resume_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/1143/0809/files/wirasitun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/fisipikinosal.pdf
    • https://static.usrfiles.com/ugd/b8c837_79cc6e811873480ca61b1ff00357a0c7.pdf
    • https://static.usrfiles.com/ugd/71fd01_cc396b8e82e94d4eaa1deaabcb87de3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dccb9b98fc04a7bb503fab77e2589b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_beba4432736d44e8bebca1d18845bce3.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_off00005f6d.bin
c294e94bfca295c4e0393e38ae8eafec46a76ca36f6bca4614cc7128e192b470
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6D 5440 bytes
font_01_sfnt_off000071d2.bin
50a856ca94f34e92fa716b460ee87d2fe0fcffd3d87475fc52e2311b47d0ac58
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 10028 bytes