Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7081765f1a0b51…

MALICIOUS

PDF

45.2 KB Created: 2020-09-01 17:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5344eb27ba73557e153717101833539 SHA-1: fc5c910c5e2928d57620b5ae1a6ace13cfc9a9ad SHA-256: ae7081765f1a0b51ca2304c0d5066980ad41fcfb359cf67ea4b6c46999477ce2
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.me/wix?keyword=benares+honkai+guide', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=benares+honkai+guide
    • https://cdn.shopify.com/s/files/1/0430/4502/7993/files/12526507685.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/iron_carbon_phase_diagram_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/kimajijorodezozib.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/90060969353.pdf
    • https://static.usrfiles.com/ugd/d94ae5_8aa6e610f09d46f8b4b8ad65e5282ac9.pdf
    • https://static.usrfiles.com/ugd/26481d_1126689d117941689109f3817d656513.pdf
    • https://static.usrfiles.com/ugd/d1c05f_7581c98956b54323869aa39fc365728d.pdf
    • https://static.usrfiles.com/ugd/b916f4_b314302316d542d9a33e6a75070d937d.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/jirurusoxuvujesamamamuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/nadujatekokem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/31994149595.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/wotijuzezutoxap.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/17723107012.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/boliwawukigobejoxezazuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/nebedafitalojinulubojozak.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/20530863830.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_off000071a7.bin
53c5aaa7b2b6e86040d6f2c1fafa31d493743f2f604943299d71f4046f6ff734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 5168 bytes
font_01_sfnt_off00008337.bin
54cf574738d061c8ef4a0de542a9cc21767e20a046eeebebb4cf5eb16f41be8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8337 11096 bytes

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