Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99a4277562639a6…

MALICIOUS

PDF

49.2 KB Created: 2020-07-28 17:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a242f9781f88f3e88b32eabe6c91a5ba SHA-1: c3a6b5382af4f1e36983ca7befdb168c9f0d2ba1 SHA-256: b99a4277562639a6aee216c55c8a1f5ac472cbcd98a123983c45c7f81937ab45
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a movie trailer, likely serving as a lure. No scripts were extracted from this sample.

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.ru/pify?keyword=cloak+and+dagger+trailer+freeform
    • http://files.greatcommissionalliance.org/uploads/1/3/1/4/131453276/0e58ed5ab19d4b.pdf
    • http://files.mrsgalaviz.com/uploads/1/3/2/6/132682829/debukomepemulitaziko.pdf
    • http://files.adventuresav.com/uploads/1/3/1/4/131453215/6070745.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/dosuvowasedowavivowuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/sutateruziwif.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/57353305741.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/53258971226.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/luganuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/xogadexewemuzulefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/94061361776.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/banolegizemexuxitupibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/wikerorise.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/wewuduvolax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/61521813323.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/s/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075fd.bin
5fbb7c99ad252f5c94044ced81ba8b999848a4300977498791c593fcb79ca9ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 4924 bytes
font_01_sfnt_off000086a2.bin
f07396c068e05de770a7f8f7f0fc38e08509c08a061cc770ca71c83bdf8b7d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A2 1980 bytes
font_02_sfnt_off00008ff9.bin
268b207a272ad33181c5d84903b768c708391d6d97d3fcdae5246e4148096bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF9 11080 bytes

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