Malicious PDF — malware analysis report

Static analysis result for SHA-256 872ca1ced9ab0de3…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 05:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b48f4dd2641ae1e2d1cb8058fd223282 SHA-1: 1edd3e5bec60e947d8eb9391bc219da50f402706 SHA-256: 872ca1ced9ab0de36c885542778b8a500de691bdfdd0c62440e1551e15b141a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that point to a known malicious redirector, ttraff.cc. The document body, though partially corrupted, suggests a lure related to a treadmill manual, which is a common tactic for phishing or distributing malicious content. The presence of numerous external links, many pointing to PDF files, indicates a link farm or SEO poisoning attempt to increase visibility and traffic to malicious sites.

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/wix?keyword=gold%252527+s+gym+trainer+430i+treadmill+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_9f57a5ba806046d4a72a8a2e41809605.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd8539a7c5b848be8d4ab155ebe52973.pdf
    • https://static.usrfiles.com/ugd/b8c837_9631e454f8c64eb89350741a13eb1129.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2e05f65027e49acbad4d1839524116b.pdf
    • https://static.usrfiles.com/ugd/b8c837_658eb02af51e4b33abb5bdd290bff5be.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e9a429be1e4763a90f3b4f09320ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d237b1638054691bbfc12eece92e935.pdf
    • https://static.usrfiles.com/ugd/b8c837_09df41dc88e24c8cb260ba7435897a25.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/70324359608.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/butterball_electric_fryer_xl_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb28dda2c08d462290a8804f671fe9d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3432394b27c49f6849e96a7c898cee8.pdf
    • https://static.usrfiles.com/ugd/b8c837_20d82a16a88e4f5791e57b7def2b1a52.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a2a236fe1de4d8498484f8107950dcb.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_off000068ae.bin
7d5dc18d3d1eca46bdc9a9fff437ba7d57cd59b808314ff82f2b6ade5ec78d29
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AE 5708 bytes
font_01_sfnt_off00007c1d.bin
cad240e70fde4de74afab0713a0415366af2cda1a289a44781d1835730590194
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 10640 bytes