Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cb2d231155c9fd…

MALICIOUS

PDF

49.3 KB Created: 2020-08-31 17:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a632058d446cd963a08681359f718f14 SHA-1: 86a495f009c5d4cd4621ffeb106a26fdcd8e8442 SHA-256: 01cb2d231155c9fd11b83a0d9f9f0df31ff4e7448e25f31b0ef5b4c6e522da3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=arjun+deva+hd+movie', which is likely intended to lead the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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=arjun+deva+hd+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/162fe6_6b246e749baf47d09cb3daf556c30119.pdf
    • https://static.usrfiles.com/ugd/0baf77_99faf11e9263448a8c818a279e1f16c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_960112edbdbf4e43a1dc4431a4aea00f.pdf
    • https://static.usrfiles.com/ugd/97634b_9a96e019a8764c1281265cf6c2d15c8f.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/kodedulisaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0583/files/pewezedefuwotumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4657/files/barredora_automatica_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/jadarewavupibonejubunixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1048/9496/files/classic_wow_leatherworking_guide_1-_300.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/dabenotusividatososodalor.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/megufiwodenodese.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/jakiwawew.pdf
    • https://static.usrfiles.com/ugd/b8c837_7510344d1e0c476bb8ebc350a2eb4e51.pdf
    • https://static.usrfiles.com/ugd/b8c837_10bbf1f3083b4508a2fc06a12fa4fd97.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc75df98817d440eaba87af0d092cd52.pdf
    • https://static.usrfiles.com/ugd/b6edda_5faed3d8223b4a888bcbe5dd9c98d863.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e77.bin
0eb6262ec1976ab4b3086a4121980e4c58bea4202fb5cf8f063a7441b5b0e6a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 4980 bytes
font_01_sfnt_off00007f45.bin
8ba5943f36451c7ce7c0bddc5c173bd2a5778a36a9d38df0f306104b00804eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 10396 bytes
font_02_sfnt_off0000a30f.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA30F 16164 bytes

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