Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ae8d3341b48fe9…

MALICIOUS

PDF

46.9 KB Created: 2020-07-30 20:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f1e3beb9df569cb618c91cad0c8a32 SHA-1: a3fd3586645a5726e3ab03a27aba303356e1675d SHA-256: f9ae8d3341b48fe9adea558a5aa3f32b1d1cadc30c679fb89578c6cfcb27dc80
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that is likely part of a phishing campaign. The document also requests sensitive recovery secrets, indicating a social engineering lure. The presence of numerous embedded links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.cc/pify?keyword=medium+access+control+sublayer+in+computer+networks+pdf
    • http://files.omdoggies.com/uploads/1/3/1/4/131453735/bb84246d8.pdf
    • http://files.seizediem.com/uploads/1/3/1/4/131438741/vewim_gifesimefipotu.pdf
    • http://files.windowsofatlanta.com/uploads/1/3/1/4/131407655/62846ed44b43afa.pdf
    • http://files.primarylanguagearts.com/uploads/1/3/0/7/130738696/bad3ba6af63188f.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/61954342214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/41631326756.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/feloxadejipofomif.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/nukoxodomi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/6981489847.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/mizofegonipoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/17736297911.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/jumaxedupalubuvimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/repibivinurimevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/wegupanogorelokix.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://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000788d.bin
a747d123030346261e49b977c08f0bf3086be52b8ccfa992bcf5fc866328485a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 5588 bytes
font_01_sfnt_off00008b81.bin
4b953cef0ff0d43ab1db055623bd1b40fccb415715fdcba7282e6c5e7fd43aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B81 10220 bytes

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