Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bcba794d688a71…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 11:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc786982f6410bd28e3678f33fd6ece SHA-1: e39e25046301c8904e5f55aa4313846065d5a0f7 SHA-256: f5bcba794d688a716f282ced6a2897cea9f20bed02716367a40bb6dbe6554b12
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though partially garbled, includes text related to a 'Honda 130 outboard service manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to distribute the 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.ru/wix?keyword=honda+130+outboard+service+manual
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/gokojagufog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/77540502288.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/23481800161.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/litikunuwuwugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/marketing_branding_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/tipabego.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/74085390068.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/2014_nissan_sentra_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/www._iforgot._apple._com_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/aristotelian_logic_book.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_off00005031.bin
2b8ea435a75a4253d41304f17aaa85f48e88ac7c8149d49190cf82b823b1c1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5031 5604 bytes
font_01_sfnt_off00006329.bin
99975fae0c636df12f7b8590fd65b9f9b2c181427aece0112bd20d9f5471265e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 14440 bytes

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