Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcc79c70bcadfbf…

MALICIOUS

PDF

48.8 KB Created: 2020-08-19 15:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13ea934ad5356cd4b2690a041781ecd4 SHA-1: 208c4cae1c69cf45e8e1065f9abb283b15f0e544 SHA-256: 6fcc79c70bcadfbf0b637b804cd0a54e7b9d1d8297099fdb2456942ae9846bfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of external links, many pointing to what appears to be a link farm designed to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious payload. The document body, though heavily obfuscated, contains the target URL and references to other PDFs, suggesting a phishing or malware distribution scheme.

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.com/pify?keyword=budapest+tour+guide+pdf
    • http://dojesosow.fredspandh.com/uploads/1/3/0/8/130813330/b73061595866.pdf
    • http://perim.aultshihtzus.com/uploads/1/3/0/7/130776279/1310796.pdf
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • http://files.thepersonalconciergemn.com/uploads/1/3/1/1/131164093/b31aa93b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/12644784735.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/nedawurewugelofedur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2610/files/nagufulame.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/1292888945.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/25749035333.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/valesanajapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/marebekufevujasegugoxixan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/wusobunaratavab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/bojujurulitokizolodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/migoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/28843026104.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/vuwapekulutobinuluropax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/mariner_fighting_style_5e.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_off0000808d.bin
2fbd7245de765bc8580f378fe8ed7ed53c59eb0ecad6b6bb4d7af8da162c2a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 5224 bytes
font_01_sfnt_off00009262.bin
c9b843a47a374856ef02804c9e68dc86d03947e4c0a78c03d43df01434dc4c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9262 10624 bytes

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