Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d1499fd90cf4aa…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 05:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80727581826427d88e846e3575c1554b SHA-1: a6c250d133884076762521f56e400bc4d6c7b308 SHA-256: 84d1499fd90cf4aa64f460dbdede97ea5b422631ea92a7facf178a2576369c2b
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for a malicious redirector link. This link, 'https://ttraff.cc/wix?keyword=mcgraw+hill+punnett+square+virtual+lab+answers', is designed to lead users to potentially harmful content. Additionally, the PDF contains a link farm with numerous external links, a common tactic for SEO manipulation or distributing malware. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for this assessment.

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=mcgraw+hill+punnett+square+virtual+lab+answers
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/pitakorarog.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/lofizexawoguda.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/trx_golf_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/32466853334.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6856b0e885b410c8240b9dfc9d2d567.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5d253c23ec04236bbae9f062a3c7eb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b642fa709444dccbdd7fd3345c83fc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8720849d8cc43cc9628223bf32455db.pdf
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_03f04a6c3653475ea7fac5a45a2e9289.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_off00005e27.bin
35ac51f2ae46dad258695e40686f99bf3e684643bcc8f82b7761d1fc2bf30352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 5620 bytes
font_01_sfnt_off00007159.bin
bd7baa7d14c44753d742f74edda5bacfe6f0b435a3910fac23dd35b2f7ecb832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 10156 bytes

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