Malicious PDF — malware analysis report

Static analysis result for SHA-256 3624a095b1403aec…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 08:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b910e6e6605324c93976728abf62404f SHA-1: a496ea3ff656db9720598cf6c36d96d9c3d53a3a SHA-256: 3624a095b1403aecb18c538470009c9a0219342fc2a29874fc2d9a7e372e17ef
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL, suggesting the intent is to redirect the user to a malicious site. The presence of numerous links to Shopify-hosted PDFs, some of which are benign, is a common tactic to improve SEO and mask malicious links.

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.com/pify?keyword=statistical+quality+control+examples+pdf
    • http://pizul.kenmaremindfulnessandyoga.com/uploads/1/3/1/4/131406717/fefarugawinekoz.pdf
    • http://tokise.vintageindustriesinc.com/uploads/1/3/0/8/130814535/tilurefejaz.pdf
    • http://tanetadeb.paper-scraps.com/uploads/1/3/1/4/131437604/988aa2950.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/oxford_textbook_of_oncology_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/45450325551.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/liroduxikivebekeji.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/39493499746.pdf
    • https://cdn.shopify.com/s/files/1/0450/6189/8390/files/atomic_habits_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/nefapom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/93196199145.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/xuludexenilowufepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/cpc_practice_exam_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7023/files/jepavilurejuvukotalorij.pdf
    • https://cdn.shopify.com/s/files/1/0452/3904/2205/files/antigona_furiosa_libro.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/36129399004.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off00006271.bin
d800e62ebb2fbd140661a4cf56777ed5abe8ccf52067d01bec7b90215deeeea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 5700 bytes
font_01_sfnt_off000075c2.bin
d0b9305bfb0e2b8b93d6b1e4f9b9eaac6286a8e230deecf8465d434590344d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 10224 bytes

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