Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcb90352e7217a7…

MALICIOUS

PDF

47.3 KB Created: 2020-08-31 05:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977ef68e296c59138f507eabcb7c5e7b SHA-1: 98c89c31185792c6f094319743ecb0918272fdec SHA-256: 6bcb90352e7217a75de2611e57e980610c5b1fb28a1fa9aef0a1a5004901fa3d
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to direct users to further malicious content. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=the+guild+2+renaissance+astuce
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6493/4043/files/46026894393.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/ripazuzipakixoxemuxiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/36411890355.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/adjectives_degrees_of_comparison_list.pdf
    • https://static.usrfiles.com/ugd/34ec99_eee6d24f3fed418a921866167e757948.pdf
    • https://static.usrfiles.com/ugd/b52961_d9d6a5f6706843a88e7c7fdfa232e26f.pdf
    • https://static.usrfiles.com/ugd/21e6f2_73c9e198c5af42c0914fe95c3210819a.pdf
    • https://static.usrfiles.com/ugd/45fd81_5265a5260ac4469cb1b716404647e1da.pdf
    • https://static.usrfiles.com/ugd/55f640_5c3458e4d05a4c81ba886567ea60ec1d.pdf
    • https://static.usrfiles.com/ugd/e6092c_6f918cf23df34c71aa37fd55fea4b3af.pdf
    • https://static.usrfiles.com/ugd/b8c837_60f03daf61db422c89e331811bd28e64.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd587d567d54cbfa75066e5bd6bfa59.pdf
    • https://static.usrfiles.com/ugd/5438e3_616662c6b7fc4014872eb94fd9846cf2.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_off00007935.bin
d1171b820d2572a388356f9e92ed2cf3d5840aa3cf4ee2305a2c851fae7b93a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 5280 bytes
font_01_sfnt_off00008b19.bin
da5ea9410f98fac1f55322d01823c7ac6d1e4395bc446af64b29d34e7d40f8db
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 10380 bytes