Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efda25ac6739115…

MALICIOUS

PDF

42.9 KB Created: 2020-09-11 13:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 544cf12d8b0000f75837f605dc76ffe6 SHA-1: 3c8c407569cb26ca48c0d7ca7c65b49b798be38d SHA-256: 1efda25ac6739115e1fbd9704023a4919682f5d44a03c51a0bb6b0741019674f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links. The document body, though partially corrupted, contains the URL 'https://ttraff.link/wix?keyword=mobile+themes+app+free', suggesting a lure to a malicious site, possibly for phishing or malware distribution.

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.link/wix?keyword=mobile+themes+app+free
    • http://files.louisianamasternaturalistgno.org/uploads/1/3/1/3/131379111/4197317.pdf
    • http://files.wangnaumannlab.com/uploads/1/3/0/8/130873875/f42fc1.pdf
    • http://files.corinnachong.com/uploads/1/3/1/4/131454049/kuparesa_vuvufudigumipe.pdf
    • http://files.auntroma.com/uploads/1/3/0/8/130813988/xadiv.pdf
    • http://files.pacxo.us/uploads/1/3/0/8/130814066/2522433.pdf
    • https://static.usrfiles.com/ugd/b8c837_356230d3c3694ca8af539d8cba9a1ce1.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/14686840656.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/argument_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/torudiposunuvikad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/jisotin.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/bejulefi.pdf
    • https://static.usrfiles.com/ugd/6a4619_73fa757b7bd443358539810a025b4fa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cbaf4432a3240aebeb8cc751c0e4c84.pdf
    • https://static.usrfiles.com/ugd/3a38e0_9f916f1077004b82ab8b446d9e58b21f.pdf
    • https://static.usrfiles.com/ugd/2ca22b_227719c6080c4cbca02b6304fc8bf5e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_dda84f96314644a59f6707ce6feb0fd8.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_off00006a31.bin
60377a3be95d69e8ddb4ad7452506b6bf76f55818a09f30b5834b05068972f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A31 5284 bytes
font_01_sfnt_off00007bff.bin
a8783c017d8cf8d2fb2641472a2df3a29b12bef9d75dea79aa27fcf9f02287f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFF 9776 bytes

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