Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dab297e08e4f11e…

MALICIOUS

PDF

38.9 KB Created: 2020-09-15 15:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ce5c310f5e2852eed6cd52d250d79a SHA-1: 5e6e67a7b9204b619d4728639035f781ce494314 SHA-256: 0dab297e08e4f11e6eea76308833d03926c66d5068b056cf0ca98590375b0559
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a link farm. One of the primary links, 'https://ttraff.com/wb?keyword=prefix%20vs%20suffix%20or%20root', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites.

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/wb?keyword=prefix%20vs%20suffix%20or%20root
    • http://vefikajum.e-c-m.ca/uploads/1/3/1/4/131453060/3570267.pdf
    • http://files.delawarefilliesfastpitch.org/uploads/1/3/1/4/131406739/tesitoredoxe-zanimevizetax-xolomas-rubinone.pdf
    • http://files.greatscottideas.com/uploads/1/3/0/7/130776499/gigifugazuzaw_sibenozubegefa.pdf
    • http://kugero.studio339.net/uploads/1/3/1/3/131383748/kixigeduvawote_tularu_xagufubiwiz.pdf
    • http://files.kitsapcounselingservices.com/uploads/1/3/0/8/130814258/8914f00d3ee69d.pdf
    • http://files.njvintagebadges.com/uploads/1/3/0/7/130739864/992709.pdf
    • http://files.monasfamilyemporium.com/uploads/1/3/1/8/131871745/xofozudule_funuzuxap_saluxude_fepumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3f80ec_74dc03b86e424732ae6ef22d1d389016.pdf
    • https://static.usrfiles.com/ugd/e3ff21_b215447e30a3434eb4310491dc65a018.pdf
    • https://static.usrfiles.com/ugd/8b4172_12b6e41b135b48ddbc49bfcf81bfdbf9.pdf
    • https://static.usrfiles.com/ugd/a298ce_ede4e3edd8344a1bbcb0b72d848a1e8f.pdf
    • https://static.usrfiles.com/ugd/ecd213_49571ff4d76c4daaa93b875ea0ad14b1.pdf
    • https://static.usrfiles.com/ugd/165585_19f415e2f8c049daa0fb6851e8858ab9.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_off00005ddb.bin
8374aab318935415737ed8110eb33c8576eb8cbff57127af3ae40f944fb8f4af
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDB 4648 bytes
font_01_sfnt_off00006dc5.bin
55b4dca6b6429d8800aad816a21ba9e4c54dcf99292098fccdf3c6255a35e042
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC5 9792 bytes