Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedbd61a06f7972d…

MALICIOUS

PDF

63.2 KB Created: 2020-08-12 00:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc295e64995a41c1f3c73fee94eb7d5 SHA-1: 3903d05e3c29691dbb0548597a0d49e98c77284e SHA-256: dedbd61a06f7972d5860cf47a12af93de0756eea554ec111233511523c3d5790
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=gujarati+bhajan+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=gujarati+bhajan+pdf
    • http://files.marieandcarol.com/uploads/1/3/1/4/131438843/zuvezolezam-ledojutenidemos-moriduvepizi-motabim.pdf
    • http://files.sweeteventsbayarea.com/uploads/1/3/0/7/130740110/1fc28a7266e659.pdf
    • http://files.amazinggracebridgetown.ca/uploads/1/3/0/7/130776875/niwofiriwomivo.pdf
    • http://rovojir.xavierlecouturiermusic.com/uploads/1/3/1/3/131382406/a617f0195f.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/78087267534.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/budgeting_process_in_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0440/2426/6917/files/capacitation_des_spermatozoide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/28384788696.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/pejakena.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/oscilloscope_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/98635407460.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/nisixijuraja.pdf
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/shri_suktam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/pakoju.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_off0000b222.bin
ad9da0e16b2051bdb5ad070f4bc339d8d096b5c9dcd980bc022b5b82bc7af8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB222 5168 bytes
font_01_sfnt_off0000c3b3.bin
85496b6d91e23ee37cb49b3d25f9dcf4777debf1897d8089f28de4007d7dee31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B3 14128 bytes

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