Malicious PDF — malware analysis report

Static analysis result for SHA-256 1717f9174d6c0941…

MALICIOUS

PDF

66.8 KB Created: 2020-07-29 13:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a30355e6727f8b35b0ce3d8e404b6fb SHA-1: 382a9425cbf3e52e5dce504db0632093449f6168 SHA-256: 1717f9174d6c094169bda712009bad4e2e0a2c56ce1e07f29d9e54c028b7015f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector and the link farm pattern suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=immunization+schedule+table+2020+pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.houseofbellator.com/uploads/1/3/0/8/130814227/deduzaxilusixom-vuxulatepojo.pdf
    • http://files.rideaulakesdirectory.ca/uploads/1/3/2/7/132712193/2638812.pdf
    • http://files.denisenicoledesigns.com/uploads/1/3/1/4/131454733/7208221.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/sunagifotevegitafijopowud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/17647676189.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/38208029096.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/73635486359.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/15285726277.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/kolorosumikub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/sukikumizusugetu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/50229507576.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/zagobufeveganuxeralaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0710/7495/files/jifelusilineme.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/5939330892.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/kujunosogafaxodobirusizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/89113938687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/96673180063.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd4a.bin
233b1703343cceba315eee177ca950ac8e21880bb3848c27204b36ab6ca6bbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4A 5584 bytes
font_01_sfnt_off0000d014.bin
c9dbf1048b65b18d0424a48f956882bda9992acabb9d33c043409f51b078df3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD014 14988 bytes

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