Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb30c6db0c4b676b…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 06:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18d12893a39e9aec468a63064798f7b1 SHA-1: 74dae47c60483fa2d26ba51c961e93f743ab1ef1 SHA-256: fb30c6db0c4b676b8c9749786aa4604468313d9154e9bf0e672c51cebbedea74
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download a file. The presence of numerous other links to Shopify and other file-hosting domains indicates a link farm designed to host malicious content, further supporting the redirector's purpose. The ML classifier also 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.com/pify?keyword=gimp+2.+8.+22+user+manual+pdf
    • http://files.bulutmak.net/uploads/1/3/1/4/131438758/7cb650f44.pdf
    • http://files.rivertradejunction.com/uploads/1/3/1/4/131483391/e8bf951e4cba.pdf
    • http://files.edgingtonroaddistrict.org/uploads/1/3/2/6/132681625/ef0ba4130b9.pdf
    • http://files.meganhealymusic.com/uploads/1/3/0/7/130739318/9063159.pdf
    • http://files.gwrrautahhome.org/uploads/1/3/1/0/131070152/jibevur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/virilopaxeduvisozab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/vimod.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/fawijovuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/30334060765.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/49331653038.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/tenulojomideveb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/vuwasunegegosojinulefef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/28239801920.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7555/files/23822840178.pdf
    • https://cdn.shopify.com/s/files/1/0448/5152/7842/files/trajan_pro_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/rilobobiwajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7805/files/sinuba.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_off00007011.bin
f0d10f58c2e986dd1ded0bd13a4b1a85f5a2f4560da72829f75221176ca263de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 5576 bytes
font_01_sfnt_off000082f7.bin
26da0fdd0e23fcd6d07613a4052f8b7588369f6b3bacfbe584b654ccf74f155d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F7 10220 bytes

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