Malicious PDF — malware analysis report

Static analysis result for SHA-256 735d160585ab5a9d…

MALICIOUS

PDF

84.9 KB Created: 2020-12-09 23:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f12af7d6ee06163a0f6942d63c55d6 SHA-1: 1713e6b46a5268a2abae5cdcddd49c2bab5640f4 SHA-256: 735d160585ab5a9d5a3bbabede41844e8a09aa36d87886697a671ddbcdc998a1
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of an advance-fee scam, containing lures related to lotteries, prizes, and parcel delivery. It includes a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=how+to+find+residual+income', which is a primary indicator of malicious intent. The document also contains a large number of external PDF links, suggesting it is part of a link farm designed to distribute malicious content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://cctraff.ru/strik?utm_term=how+to+find+residual+income
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5fb5d47836d60.pdf
    • https://bewimesev.weebly.com/uploads/1/3/4/7/134753962/xuxagede.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fad76bd6881e.pdf
    • https://cdn-cms.f-static.net/uploads/4445882/normal_5f9f63a462533.pdf
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f89cf155b561.pdf
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fbbdd67d2df5.pdf
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/1964211.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/teximikamukubo/hurtworld_v2_guide.pdf
    • https://s3.amazonaws.com/dozore/manual_chamberlain_whisper_drive_plus.pdf
    • https://s3.amazonaws.com/dazifozixawus/palenawog.pdf
    • https://uploads.strikinglycdn.com/files/7709310d-6a40-47f2-8248-c1607d2a8b68/dusakidesozos.pdf
    • https://uploads.strikinglycdn.com/files/b20831d2-c259-4131-8979-59fe16620a83/mabojatavawojisu.pdf
    • https://s3.amazonaws.com/turip/degegadafepakiligebex.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_off0000fa7f.bin
f87430724eec173d272b1c02b0bb95bb7a7c4c8e150a7e5ce5cea95bdd616d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7F 5220 bytes
font_01_sfnt_off00010c3e.bin
ece03f0f9a1a4e9626d069480c43374094cc1f63e651a5441b4201e021003707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 10596 bytes
font_02_sfnt_off000130c3.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C3 16312 bytes

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