Malicious PDF — malware analysis report

Static analysis result for SHA-256 604ffe0478f92ba1…

MALICIOUS

PDF

37.9 KB Created: 2020-08-12 05:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2fa10d7e36c21ccd3c480cbb6f751f4 SHA-1: 73e7e6e04ded0018b066df10924418c347c612dd SHA-256: 604ffe0478f92ba1af89c2d928e540f2549e6587445fa1eeacde68a18c1c0e31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. Additionally, it hosts a large number of external PDF links, many hosted on Shopify, which is indicative of SEO manipulation or a link farm used to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/wb?keyword=market%20leader%20intermediate%20pdf%20free%20download
    • http://files.janetashley.net/uploads/1/3/0/8/130874510/vadulator-badidugamixevi-tejulesimad-xudek.pdf
    • http://files.podunkideas.com/uploads/1/3/0/7/130740211/2458681.pdf
    • http://mugara.gddphotography.com/uploads/1/3/1/6/131606289/9c9b61c754.pdf
    • http://kixuza.gcsecs.com/uploads/1/3/0/9/130969465/kitosob-bedevutolav-poxirekatogu-gadejiv.pdf
    • http://files.diyprojectnest.com/uploads/1/3/2/6/132681245/dca084784d36b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0323/9835/files/bagune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/gilbert_castellan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/57815332027.pdf
    • https://cdn.shopify.com/s/files/1/0452/2383/7856/files/disadvantages_of_smoking.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/bihar_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/97686612478.pdf
    • https://cdn.shopify.com/s/files/1/0454/5308/2782/files/bbq_smoker_designs.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/3037878926.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/14365876725.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/75794914620.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/14243956625.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_off00005518.bin
7294fa043381e81aa108ca34a22d0d130891773f9bf175258dcf2ad64912ea2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5518 5168 bytes
font_01_sfnt_off000066b7.bin
e236f451dcc3c37f1c857653620b755e934fc37b5a6e751d5fd9449358d01f9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B7 10812 bytes

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