Malicious PDF — malware analysis report

Static analysis result for SHA-256 6475c12e68d38afa…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 15:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c151a4758c09e65c0e674d6da229864 SHA-1: 58d61fcc4df12aed4b59ca5ba7f6ab9c5228b2c8 SHA-256: 6475c12e68d38afa445fe79d35a48f08fbca3b4fea49e9b75672a2bf04753f3b
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, identified as malicious. The document body, though heavily obfuscated, contains text related to 'Dodge journey repair manual download', suggesting a lure. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a link farm used for SEO poisoning or distributing further malicious content. No scripts were extracted, but the PDF structure and malicious link suggest a phishing or malware distribution attempt.

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/wix?keyword=dodge+journey+repair+manual+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ade4e6_6f8f763a817e4777a48678caf57967fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_7046c48c428e4ba9b66b01ef9ae738b3.pdf
    • https://static.usrfiles.com/ugd/078c79_8f83e92dee4e4d93b47f2c4ab54d43a7.pdf
    • https://static.usrfiles.com/ugd/122077_ed53e6c7d8244a7293a9e6d6a0120f54.pdf
    • https://static.usrfiles.com/ugd/32acb1_597b5a3d237f44c89206f15c9e467cf9.pdf
    • https://static.usrfiles.com/ugd/1be480_5353a2c24b804184b5bfc55a193df1af.pdf
    • https://static.usrfiles.com/ugd/af0aa9_3c3e1300de9441c8b939eb3a0f6cb862.pdf
    • https://static.usrfiles.com/ugd/8b9728_1b0d80dc5f584f78a0d395ff58e9e836.pdf
    • https://static.usrfiles.com/ugd/1b8612_a6097e1456384b22a5b7e3983c5b4bca.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c0101b12be4433f90a782b02d807459.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cefc7238c4540a884b66f684e1a503d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78055f4d46e43aabdc759bd590ecc76.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_50d8e9c2ba5d4353a7d358380b06ffa1.pdf
    • https://static.usrfiles.com/ugd/11f207_afba3ffdbf8a4ebeb05d1ef0f6cc66d4.pdf
    • https://static.usrfiles.com/ugd/5be868_74fd711992d04a3d92155b8ab09cb869.pdf
    • https://static.usrfiles.com/ugd/510a18_c51f96aef8554721ab19937ee58546d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_57137dab6b5e4bcf8e4a879fcffdeab8.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_off000070b8.bin
efe9e1c5a03f64e711a5bfcfcfcb2c6af2cce191b5664192f5275a7409b4c1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B8 5372 bytes
font_01_sfnt_off0000830a.bin
64922d34fe872092f485251385e17cf98d69d2d5df8b81bfbd102245604d7d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 10296 bytes

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