Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6557250a2673d3…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 13:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71b043899956daffee6709a944bdc5ce SHA-1: 3efc35e43d0d46663af4255a350a75960b48a574 SHA-256: 2b6557250a2673d32fbd4fc5a4cacb614de66d6361fe784a5aecaceb7b9cd679
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to `https://ttraff.cc/pify?keyword=incarceration+nations+baz+dreisinger+pdf`. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with `https://cdn.shopify.com/s/files/1/0434/8005/5965/files/42424097307.pdf` being the first identified. The document body, though heavily obfuscated, also contains these URLs. The primary attack pattern involves luring users through these links, potentially for SEO poisoning or to redirect to malicious content.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=incarceration+nations+baz+dreisinger+pdf
    • http://menuwab.btnmusicfestival.com/uploads/1/3/0/8/130814328/4501373.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5965/files/42424097307.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/98226641792.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/pain_three_days_grace_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/xapafotuzini.pdf
    • https://cdn.shopify.com/s/files/1/0464/6633/4888/files/69363713585.pdf
    • https://cdn.shopify.com/s/files/1/0436/3694/9152/files/zazufamerak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/pathogenic_intestinal_protozoa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/jurnal_sejarah_pendidikan_islam_di_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0440/1843/4213/files/ejemplo_de_acta_constitutiva_mexicana.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007874.bin
07a22cfbbc7d84ac3c6f9c3a009d669e0cd1aa017546266118334fd1a4ea5c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 5420 bytes
font_01_sfnt_off00008ae5.bin
1f58c348b235cb6bbf45c568330206b67ab6478efc6c6536387f1f05aad7c702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE5 10304 bytes

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