Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c2e161f50b3449…

MALICIOUS

PDF

43.1 KB Created: 2020-09-11 06:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e98e7a98e080329fa947af9d8d1ec548 SHA-1: 6615af588c4ea83cd71041a4643b9bdcd32febe6 SHA-256: 93c2e161f50b344967939ec4077d1b4da2c406b8b96ce8e69b70868f6d39a49e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'ttraff.me', which is likely used to obscure the final destination of the malicious payload. The document body text, though garbled, contains the same lure text as the URL, suggesting a social engineering attempt. The presence of numerous other PDF links, many pointing to benign content, may be an attempt to blend in or create a link farm, but the critical heuristic firing on the redirector link is the primary indicator of 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.me/pify?keyword=do+the+boogie+woogie+video+song In PDF document text
    • http://files.autopilotassistant.com/uploads/1/3/1/8/131871912/zazinoxogenekereraj.pdfIn PDF document text
    • http://files.menofcouragela.org/uploads/1/3/0/7/130739122/fd6e74b5.pdfIn PDF document text
    • http://files.eatatheritage.co.uk/uploads/1/3/1/4/131438079/jazibokewekevapo.pdfIn PDF document text
    • http://files.alfonso-oliva.com/uploads/1/3/1/6/131637074/c9d6e5ac5f1a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b2ba6b_cdc3e5e2ee274281a67e3c62e89e7c50.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e16aa_58d80031d70844bb8d01a927b3063668.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_af6da79b612942f7b531b8e07985d262.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b0cb2d_85c56819dd0e4ec5acd93ef68b90fcd5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5cf39_275166ed641749b689706d770de05800.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77d535_8b3a18bb8d1e4474972bbed677ab1bbb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f7815_af780131d14f476db57c5192018d775c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/madinah_arabic_reader_book_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6088/6694/files/burak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/71158736557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/65445600694.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 5040 bytes
SHA-256: 6cf75dc2b035f40b8a956ff779d628aedabe63c91e95c4655407033fe3fbb0ec
font_01_sfnt_off00007d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 10116 bytes
SHA-256: 58515f6b67c4bb8a5c9abb0082f93ef3e72a574aac34a92a055d7727aa4fb6b7

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