Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bb096f45b3273f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-26 03:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b529105f1cda5a517c5c01806118cbe5 SHA-1: 91ff71d965a42921a525bcefa82b5e9d550fc7d2 SHA-256: c6bb096f45b3273f4f33af0434fc495a874958e81dc77f86cacdd85313915b1e
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. This suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the presence of numerous external links indicates a link farm or redirection strategy.

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=teletron+bg+8000 In PDF document text
    • http://pupefinax.robynpforrryan.com/uploads/1/3/2/6/132696063/pegekepogon.pdfIn PDF document text
    • http://files.expertscontractor.com/uploads/1/3/0/7/130776407/kogikepapegogop_gisif.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/1/0465/0870/3894/files/3392390553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/possessive_adjectives_and_pronouns_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/84940335136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/operation_barbarossa_and_germany_s_defeat_in_the_east.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/sotevegojazabaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1540/5472/files/75832964412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/programa_escolar_de_proteccion_civil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/74067223085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/vabekubu.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_off0000593c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 4628 bytes
SHA-256: 6dc8f1cede1243db79784650402a99434e35bf6f02fa71c1276b11d5cfae446f
font_01_sfnt_off00006904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 10264 bytes
SHA-256: 6b16c08b72d979ab07b2834e22ea677d916ec9c367fadb171545f190ead158c2
font_02_sfnt_off00008c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C35 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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