Malicious PDF — malware analysis report

Static analysis result for SHA-256 3476ad8d820083a7…

MALICIOUS

PDF

43.3 KB Created: 2020-10-07 17:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce8a04f17174bbdaba405fedc47603ed SHA-1: 84f4d5aba192d1a69409b5282d0d99d0da6e01b3 SHA-256: 3476ad8d820083a7e8342c60a14b27c2eeed2d2cfc2e1f37d856749c491aa778
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users to a malicious site. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the embedded URL is the primary indicator of 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.club/pify?keyword=sewanhaka+high+school+principal In PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/gazuwiwuvuxusopisoxelare.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/zatetivunerigamova.pdfIn PDF document text
    • http://files.decadesboutique.com/uploads/1/3/0/7/130740025/pusodaseg-jojim-jopokeja.pdfIn PDF document text
    • http://files.maiasbeatsandveganeats.com/uploads/1/3/1/4/131438197/8310052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/lab_6_molecular_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0075/8947/files/student_information_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/venice_skills_center_dental_assistant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7483/2534/files/viroxibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6592/0674/files/independencia_de_mexico_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0352/2467/files/bunn_coffee_grinder_parts.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E76 5160 bytes
SHA-256: ea6555b5444c1a70cbecf57c282d99e5c63fa2b63a4e0b75e85bdd42471ffb42
font_01_sfnt_off00006ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 10140 bytes
SHA-256: f3e0d255e309680289bbff6fd28bb4ea49348d7c63c16a426b39a908cd14b7e9
font_02_sfnt_off0000928f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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