Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10bb49a459e0641…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 09:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1063eec77de274f01102d0fa8cfa5adf SHA-1: 630395839abcb2e2fa28ef9c47111df4998c6673 SHA-256: c10bb49a459e06412544f40eb1882443ee04d1df89feb92fbc709d8a7ea910a5
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.ru/wix?keyword=azizkhan+internal+medicine' is identified as a known malicious redirector. The document body contains numerous other links, predominantly hosted on cdn.shopify.com, suggesting a link-farming or redirection strategy to distribute malicious content.

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.ru/wix?keyword=azizkhan+internal+medicine
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/worksheet_1._3_vector_addition_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/vuliwofuniz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/nakalinobinutaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/function_discovery_resource_publication_disable_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/danizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/38056448727.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/benidapijukezepefe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/nizedekepuw.pdf
    • https://static.usrfiles.com/ugd/b8c837_349c252372984fe9b3410c02ef022d81.pdf
    • https://static.usrfiles.com/ugd/9d869b_7f3eeeaf3c8b4a2c8179a7513ef4cd66.pdf
    • https://static.usrfiles.com/ugd/6c032c_1820e8a401d84eeca58ec85f00da5acf.pdf
    • https://static.usrfiles.com/ugd/1849a1_642a61933c104500a52c84e4d0867d21.pdf
    • https://static.usrfiles.com/ugd/8127dd_6fe2763b77d042468799ea772bd0db43.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_off000047ed.bin
44b61244ad226ad1fa623d12278e822ad443dbbc57096f3c208d040d732b2068
pdf-font-stream PDF embedded font (sfnt) at offset 0x47ED 5104 bytes
font_01_sfnt_off0000590c.bin
8eb6eafe8ba15facd25c165dcd881e3f80667d00be6eeab2de47da7fe1f49cdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 10024 bytes