Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8ef1959b0e89d9…

MALICIOUS

PDF

44.0 KB Created: 2020-09-07 17:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4082e2bc4e6eb28078ce1b46f36833ea SHA-1: 5faaf9e39948356f514c6100bc4ed4c699734f2b SHA-256: 5d8ef1959b0e89d9a2f0a8bae8f0ce566507ee07db9cf20b4337a7077677b74c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=bliss+tagalog+movie'. Additionally, it hosts a large number of SEO-optimized PDF links, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a link farm or redirection scheme.

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.club/wix?keyword=bliss+tagalog+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/calisthenics_workout_plan_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/forekav.pdf
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/filmic_pro_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/65791040139.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/vmware_for_ubuntu.pdf
    • https://static.usrfiles.com/ugd/b914b5_ad22ca901b064ce388c4ecb85fa602bc.pdf
    • https://static.usrfiles.com/ugd/f84671_27d075d165d049969bf6a06a1768534f.pdf
    • https://static.usrfiles.com/ugd/99965f_b380f094cbb84d5db2c2f25e272d723f.pdf
    • https://static.usrfiles.com/ugd/3bca44_b67f932df40e462f9d17df3396c9ca60.pdf
    • https://static.usrfiles.com/ugd/1e32c2_d0ed6de7a59943b39899dd9e10a05daa.pdf
    • https://static.usrfiles.com/ugd/136d07_a5c89269d7b24cdc846613a6ac8565f4.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_2c62f24f4c7a41db9d94b952583b74b1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/tapizozapifadiwewirir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/4477013822.pdf
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/deferiborefefuseleb.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_off00006fea.bin
61f800a948bcee977f50c73ab3241c57335f863dab2cfd27de80a9b1f96cc729
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEA 5020 bytes
font_01_sfnt_off000080fc.bin
cb2b6d53549d9155331c865249b7c16a9b6434404557ce03fecf9533f5c2dd93
pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 10048 bytes