Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4fef7ce4b38d22…

MALICIOUS

PDF

49.3 KB Created: 2020-08-19 17:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4008d5a454277ea0d2d398762f267f11 SHA-1: 3fa03354e4e3d8034f5849380d735f04e6d85df1 SHA-256: 6b4fef7ce4b38d221fc626f9e5cf3f203ad2cacabe983b6c3a611d2cac919b0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=ff12+gambits+guide'. While many other links point to benign Shopify domains hosting PDFs, the presence of the malicious redirector and the ML classifier's high confidence score suggest a malicious intent, likely related to traffic generation or SEO poisoning.

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=ff12+gambits+guide
    • http://fined.colleenscutecreations.com/uploads/1/3/2/8/132816202/befomobokijawev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/gambaran_radiologi_bronkiektasis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/fire_on_fire_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/wapiwesolatenuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/lifepak_15_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/niviw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/97604114388.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/clep_introductory_psychology_examination_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/big_ideas_math_7th_grade.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_off000083fb.bin
8e3e264fc408192087b340cf9e399dc723d478ffacec7b532955c940b13e1c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 5376 bytes
font_01_sfnt_off0000963b.bin
7673b6e13b93711c609d094643b3882ae68ebf9aa06e5dac336c777ae50707ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963B 10212 bytes

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