Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb79153f2542bc0…

MALICIOUS

PDF

59.1 KB Created: 2020-08-30 22:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 919a99b6f55ce0ab6ef4291bd7e85a53 SHA-1: 6a412306bb2ac0853d6c5b016d997f25fe5f0589 SHA-256: deb79153f2542bc07e28fc3605821f45aed8757a1b38baf68e4f090282762d30
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to a URL related to 'pvz heroes cheats'. This indicates a social engineering lure. The file also contains a large number of embedded links, many of which point to static.usrfiles.com, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

Heuristics 3

  • 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.
  • 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/wix?keyword=pvz+heroes+cheats
    • https://static.usrfiles.com/ugd/ceb2e8_347878daa0db4dc4b8cba501fa83b72a.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf4ec05f5bf402faf6d38e30f2777ea.pdf
    • https://static.usrfiles.com/ugd/d3758e_cfc83010918b4773839c35f5714bc6d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac947309aaed413a945ce7c4bb124e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_e675a2250c904eb7b62ac519e0869a72.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cf667b027d048ed83fedcfa84e3f7d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9442942980d449109f7e8df780c43b35.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b2be44753840888bbca63315dc089b.pdf
    • https://static.usrfiles.com/ugd/3e9e83_fccca605af7b4975a4af92df0eb9969e.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/22128550338.pdf
    • https://cdn.shopify.com/s/files/1/0459/1468/5589/files/20458814791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/pathway_fistula_perianal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/27149036335.pdf
    • https://cdn.shopify.com/s/files/1/0438/6396/5861/files/australia_visit_visa_form_1418.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/puwonowejajoz.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_off0000aac9.bin
0fbfbbd9ae7cb6b9c9526184468945eb6714a331c1764f9cee46d206da375e9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC9 4964 bytes
font_01_sfnt_off0000bbb0.bin
7f8398d5a4022acc0c80cb4aaaaf691b0a16fd875e0703c95f2daa368ca49e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB0 10608 bytes

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