Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81b237606631cae…

MALICIOUS

PDF

42.3 KB Created: 2020-09-03 01:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d05c0cf44273a73507a2fe803bcca033 SHA-1: b638e33e49d491c968084cca55d2ef16fe4745f8 SHA-256: a81b237606631caea51332aa07817920186f6935bcc7862c8f1b4cb432ba5d16
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as nutritional information for Beyond Meat patties. This link, 'https://ttraff.me/pify?keyword=beyond+meat+patty+nutrition+information', redirects to known malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to static.usrfiles.com, suggesting a broader campaign to distribute malicious content.

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.me/pify?keyword=beyond+meat+patty+nutrition+information
    • https://static.usrfiles.com/ugd/dc6899_af09cfb593db4f77b54eb4f87d5aeece.pdf
    • https://static.usrfiles.com/ugd/451a43_b03f52089ecd4044ae29047959b0d30a.pdf
    • https://static.usrfiles.com/ugd/0286dd_3041bf120d334b25a6dc4c86871e2f05.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1c22cce53d44ffab0fb13b1d5cecbab.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_339d2f7da983464793c7df0ed98fb0fd.pdf
    • https://static.usrfiles.com/ugd/24853a_81e9e65ef6ef4338ac98410a241bc532.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd2484c14884def85a5fb0ec61fbfc7.pdf
    • https://static.usrfiles.com/ugd/af0aa9_b88d9f996d2f4287988d4021785e4b79.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_4994a3b218f543b0bf8e465838af907c.pdf
    • https://static.usrfiles.com/ugd/3bf302_627e5100f43c462b8e5a64d9bc6aef45.pdf
    • https://static.usrfiles.com/ugd/3d514e_141f1e33dfb84acf81c28c1327146a1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_473a88f600f445a1aba8ba4fff4a6b36.pdf
    • https://static.usrfiles.com/ugd/0286dd_3ca38125c3b94cb580c4e16655ce6f30.pdf
    • https://static.usrfiles.com/ugd/5be868_1fe79cadc520477d85fe90d7ed37c697.pdf
    • https://static.usrfiles.com/ugd/b8c837_535d5e5d905d4592bf1b433bcf1437bc.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_off0000660c.bin
e3eaeda512e50b352b8400c8a21a4a1637be1aad65f84bbd41d515c136a69a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5128 bytes
font_01_sfnt_off00007775.bin
a3c5914cf38041dff31388fa7e01ede232b645502f4681575f88bab0b98eb44a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 10868 bytes