Malicious PDF — malware analysis report

Static analysis result for SHA-256 f663ed24e8f29dc8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-29 01:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f54d2ef364fde35b1bac2c815a074c14 SHA-1: 55b1f7d957e8c4c5b43eaef4b94e0ab07a62dd89 SHA-256: f663ed24e8f29dc88488e2d71faed840e1564ef89cb77167ce90044c45f7aa22
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.com, which is known malicious infrastructure. The ML classifier also strongly indicates maliciousness. The document body contains garbled text but includes the malicious URL, suggesting a lure to entice users to click on the links.

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/wix?keyword=craftsman+garage+door+opener+parts+41a4315+7d
    • https://static.usrfiles.com/ugd/b8c837_83e7b438a15d4094861e66aa57458834.pdf
    • https://static.usrfiles.com/ugd/b8c837_b84c6da799b543d1a62975f5d6b26b31.pdf
    • https://static.usrfiles.com/ugd/b8c837_41dbe2e84a314494ad4f080c7dd49871.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd0386185968453bae008742b9846b92.pdf
    • https://static.usrfiles.com/ugd/b8c837_de27bb6799ad459982c9868d9d06c784.pdf
    • https://static.usrfiles.com/ugd/b8c837_5523cd984335440e959b170cb28cbe22.pdf
    • https://static.usrfiles.com/ugd/b8c837_58492f66ab424fb8bc72b81a71a7c012.pdf
    • https://cdn.shopify.com/s/files/1/0465/0785/1926/files/media_player_android_chromecast.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/11353193287.pdf
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/56258550329.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/brooklyn_nine_nine_all_seasons.pdf
    • https://static.usrfiles.com/ugd/b8c837_66ec3798ae87428899dc1dce723c1f64.pdf
    • https://static.usrfiles.com/ugd/b8c837_e995d909b2bf4266af476b56856beed5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbeb29bb667241e7a20b3e45f37606ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_664249c81da44ab2969ba9e06293e833.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_off00005195.bin
3917ea0ad6ee2a8de33c6f8f61a05208559b2c960b3ad99afc4c379e9e19cc7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5195 5744 bytes
font_01_sfnt_off00006524.bin
33cd9709cc2cbd70b0c17691f34f1f04fd83f42e0f572d187848bceb951c2490
pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 10176 bytes