Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f80a6fa7e6d6d9…

MALICIOUS

PDF

46.4 KB Created: 2020-09-02 14:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03900ac0039598811544955f31198c90 SHA-1: 145c37ca6e17675d3b92c031a85fdb88e4ba6cdb SHA-256: 47f80a6fa7e6d6d992d95eac487845beac7e69b6bc6b165abcb79c92a00a90a6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a redirector URL, disguised with a search query for popular content. The primary heuristic indicates a malicious redirector, and the ML classifier strongly supports this finding. The document body, though heavily obfuscated, contains the search query and the redirector URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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=aditya+369+telugu+audio+songs+free
    • https://static.usrfiles.com/ugd/71fd01_19b681fa36c44ad4b5786851a1d72424.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_431c18df74584f30b483f413f5d18c6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_59da4d82b3f7489ba22734dd22dd03bd.pdf
    • https://static.usrfiles.com/ugd/82e28d_9e553ea7f78b46efa789e3d0aa0b00ca.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_e3046d0d960d46d8b2374ebdbb86ce63.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/66411985689.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/52334930852.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeddb19347b04e68bcea4855b5baf55f.pdf
    • https://static.usrfiles.com/ugd/3801ff_617a857fc760488ba5d4d0cff2180ed3.pdf
    • https://static.usrfiles.com/ugd/f59309_2ac05d9852d74f098fa6b284482a5a6e.pdf
    • https://static.usrfiles.com/ugd/3fc21f_3cb41ee004144eb189441961a1af0d4a.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/
    • https://static.usrfiles.com/ugd/3801ff_617a857fc760488ba5d4d0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5f.bin
53a4a3fa6d1a180db1a9bfc658034fc4b04ac80f406bcd43d591f7829ded84ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5F 5640 bytes
font_01_sfnt_off0000819f.bin
d51be0044ef36fd06ece650d876340217f2a1ea94c9969c93cf29d748f23d6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 13868 bytes

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