Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61e62787f42746f…

MALICIOUS

PDF

72.3 KB Created: 2020-08-15 06:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09393e3a9ea2b02656bf5578b36cd6b7 SHA-1: a330a8e37dadbf9d1a04b696bded984beb6818f8 SHA-256: a61e62787f42746fbf3ed5b3cfbca56dbd0d57182a414ab777602c23e8349e57
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=godowsky%20chopin%20pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of many external links, including those hosted on Shopify, indicates a potential link farm for SEO poisoning or distributing further malicious content.

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.cc/wb?keyword=godowsky%20chopin%20pdf
    • http://files.ciaobellawilliamstown.com/uploads/1/3/1/4/131437421/gupilepofemagaxol.pdf
    • http://vupatu.shopblushsalonboutique.com/uploads/1/3/0/9/130969060/6939620.pdf
    • http://files.brickandbaking.com/uploads/1/3/1/1/131163872/fasatumibovika_pomijurud.pdf
    • http://files.killerdesigns.com/uploads/1/3/1/1/131164556/vojuvadul.pdf
    • http://gizefubi.janetreidmanphotography.co.uk/uploads/1/3/1/3/131378991/pufutupupunul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/mogaparuvum.pdf
    • https://cdn.shopify.com/s/files/1/0436/1627/2546/files/the_duchess_of_malfi_john_webster.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/zosedixariserib.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/draconomicon_metallic_dragons.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/kitojenapudevosirebe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/kabaddi_score_sheet_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/befizunofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/zokalidivuzanibuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5114/files/gokomokinelus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c206.bin
fde0a3dc5e4cacf062286db04f25dbe5fdf15978b25c500214ec0d1f001fb6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC206 5192 bytes
font_01_sfnt_off0000d3d2.bin
e6bbaffe9c6b2b97e4bda85a9509fa1c258bffdb56da3648322d0ca5599c499d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 13312 bytes
font_02_sfnt_off0000fea8.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 16120 bytes

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