Malicious PDF — malware analysis report

Static analysis result for SHA-256 7388bad365cff649…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 20:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 368411b76af076791cdd710e8f9de0c4 SHA-1: 808777704376d94bce42c01436abd51bebdbc0f4 SHA-256: 7388bad365cff649e46b21853a7779db80e3f75791c39dcf21deddd6d6150882
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The document body, though partially obfuscated, includes the URL 'https://ttraff.com/pify?keyword=guide+fiscal+uqtr', which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of many external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=guide+fiscal+uqtr
    • http://files.springvilleffa.com/uploads/1/3/1/1/131164556/nuporak-ruboluraj-judotafisulem.pdf
    • http://files.dianalara-somatics.com/uploads/1/3/0/7/130738484/gubevowowod.pdf
    • http://vakalofa.advancelabordaypicnic.org/uploads/1/3/2/8/132814930/6271287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/gixezuxemawawazibupor.pdf
    • https://cdn.shopify.com/s/files/1/0449/1021/5323/files/abecedario_chines.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/xbox_360_wont_read_disc.pdf
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/jopajatemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/55815194139.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/71579456860.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/audit_trail_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/wowuxuvaminekaduse.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/74264157367.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/lopesupopuwodor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/veputuwoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1077/files/basavenaxexidekafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/worisolonofi.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005112.bin
6796ddd8e5ca8dcd294523dc4c57afe5fc03116bcf8a6d2c1da330ee18940c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5112 5172 bytes
font_01_sfnt_off000062b2.bin
f87c49502332918573875ac34c853a46ab4c6079910db130885c9a2d9679dfd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 10536 bytes
font_02_sfnt_off000086f2.bin
d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F2 16164 bytes

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