Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f10484e5092123…

MALICIOUS

PDF

41.9 KB Created: 2020-08-17 04:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7a80818e98dd748f96a1f952634f6f SHA-1: d1b5395a8e70a9e2e8a9cbe7980d03a8b31f6a5f SHA-256: b8f10484e5092123ffc1e54961fb3dbb3fc7707a500e60b0ef02bde8ab593bc3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One of the primary links, 'https://ttraff.ru/pify?keyword=dyeing+cotton+sheets', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other links pointing to a large number of PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The overall pattern indicates a phishing attempt designed to redirect users to malicious infrastructure.

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.ru/pify?keyword=dyeing+cotton+sheets
    • http://files.scireinke.com/uploads/1/3/0/9/130968933/guwidagubarafafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1599/4529/files/gefanajijawulenuwogojo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/10029142620.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/example_of_apa_referencing_style_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/13703850695.pdf
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/37195944301.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/rulof.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/livro_abordagem_centrada_na_pessoa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/37213254836.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/jenunupukojexozazezited.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/motokilibaledapodid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/youth_bible_study_topics.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/bemofufukenedanenurorif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/falaxozus.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/
    • https://cdn.shopify.com/s/files/1/0430/284

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ad.bin
e0285a719daa4b428fe31bf2c6b689ae7d51e0df53ac76d13e0a26d7f51f452f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 4824 bytes
font_01_sfnt_off00007629.bin
cc2cc6d0dbf97ef5cfc33224afe9a0d3a437d227e64d79b139f89c5f7c11785f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7629 10652 bytes

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