Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fe61a3fdce87c9…

MALICIOUS

PDF

46.1 KB Created: 2020-08-28 14:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c0c14428ce2fb28efad29415b8427e SHA-1: e57c16acd4866361b616ad0101550ab2b51d0324 SHA-256: 62fe61a3fdce87c969dd81fe90c3a656d18727a55aa6fee4d1a8c1162aeee04c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=bentwood+box+template
    • http://files.reedcusterband.com/uploads/1/3/2/8/132814022/zabaruribuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/53093159352.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/agile_software_development_principles_patterns_and_practices_martin.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/rubber_sheet_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/14947982726.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/bateresiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/kowojavava.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/93800346984.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/chief_keef_thot_breaker_mixtape.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/mamuwozubomonekibiratewub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/82903811964.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/pavagusarugepuzavezuk.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_off00006eec.bin
64f06c13bc4aa1284a52f548e5ee2cd94cd43157a1c3778e807f70f59d9d58aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 5180 bytes
font_01_sfnt_off00008090.bin
a700253c52b8be12d21571344e379fcba752b494371292ff447429be8cf17551
pdf-font-stream PDF embedded font (sfnt) at offset 0x8090 13712 bytes