Malicious PDF — malware analysis report

Static analysis result for SHA-256 099a4d1bbd10f013…

MALICIOUS

PDF

90.9 KB Created: 2020-07-08 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2e1b4239f57a273f411f83c6b141f82 SHA-1: 9ee3ff22f80361d30b829def300e227832ec01ec SHA-256: 099a4d1bbd10f013fc6c3b11e582fdd2f2f0f97477232e48c788a5d23bb6ebc0
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm infrastructure designed to obscure the final destination. One prominent link redirects to 'ttraff.com', which is flagged as malicious. The document body also contains obfuscated text and URLs, suggesting an attempt to disguise malicious content. The presence of multiple PDF links and a malicious redirector indicates a likely phishing or malware distribution attempt.

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/wb?keyword=2007%20fiat%20punto%20dynamic%20manual
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.palmettopreswm.com/uploads/1/3/1/3/131379951/bd3da.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • http://files.bellarunequine.com/uploads/1/3/2/6/132696280/0df7a816.pdf
    • http://files.glastonburymotherscollective.org/uploads/1/3/1/8/131856518/8f54a.pdf
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdf
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdf
    • http://files.luxurybeautylounge.com/uploads/1/3/1/1/131163563/8035564.pdf
    • http://files.cvilleathon.org/uploads/1/3/0/7/130739183/warokazelibijefiketu.pdf
    • http://files.aawholesaledallas.com/uploads/1/3/1/1/131163945/8f745b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tanutukezod.files.wordpress.com/2020/06/78338292566.pdf
    • https://julaxotetelu73207895.files.wordpress.com/2020/06/41201899361.pdf
    • https://taxasegino.files.wordpress.com/2020/06/19857644310.pdf
    • https://xabofufutin.files.wordpress.com/2020/06/buluxuxuratepenud.pdf
    • https://kuvozer.files.wordpress.com/2020/07/46772155910.pdf
    • https://xeburov945496308.files.wordpress.com/2020/07/68518894634.pdf
    • https://zutatakinud.files.wordpress.com/2020/07/62952675705.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff83.bin
10c52001cf7df6b63b219f2d161ba7b08693c87f70647cc2a1f520c0f65981c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 3752 bytes
font_01_sfnt_off00010cba.bin
af627e4390cbe2e9ba6fb39017f3f6a4ac7f8b34d69f964e580998685333281e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 5152 bytes
font_02_sfnt_off00011e26.bin
e953f90e94410a841747964ba3eb1472df7fd644935ab3259534294daf0218cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 13288 bytes
font_03_sfnt_off000148f0.bin
b5f1397982530d9e987604a9fc8467d56fd147c09520e12e54de27667870b356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148F0 16088 bytes

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