Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0d9b4afc9c44ff…

MALICIOUS

PDF

68.2 KB Created: 2020-12-31 19:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553054f883fb2978cfaa710dc2f88841 SHA-1: 78e379b67a763d3171812a872d04691b2d58777f SHA-256: 7a0d9b4afc9c44ffe28110e3845a807cab5a0ae85a35fc66b1355d76eada6879
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/strik?utm_term=mobile+legends+bang+bang+nh%253F+p+code'. This indicates the document's primary purpose is to lure users to a malicious site. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were extracted, the embedded URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=mobile+legends+bang+bang+nh%253F+p+code
    • https://cdn.sqhk.co/rosafipex/FeT5Jhg/archery_shooting_gloves_uk.pdf
    • https://cdn.sqhk.co/kupovite/smgiphd/gevogisewuve.pdf
    • https://cdn.sqhk.co/sikibeve/YyQrqcY/10046263536.pdf
    • https://cdn-cms.f-static.net/uploads/4459623/normal_5fada20580b0c.pdf
    • https://cdn-cms.f-static.net/uploads/4417530/normal_5f98c4ffd9564.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jemisajoda/bojafufakazewumiku.pdf
    • https://s3.amazonaws.com/jidosatikim/dozejanobukepowun.pdf
    • https://uploads.strikinglycdn.com/files/b0897f5b-e6a3-4c3c-9bf6-e758dec039eb/canon_print_inkjet_selphy_app_ios.pdf
    • https://s3.amazonaws.com/rupatojuko/lexegiwinasa.pdf
    • https://uploads.strikinglycdn.com/files/5ac5de0a-027c-408e-bfcb-c610312c5e01/75820058290.pdf
    • https://s3.amazonaws.com/jifesu/8201058927.pdf
    • https://uploads.strikinglycdn.com/files/dc1e5654-4fb4-4d88-8de6-0496ee6b2ff1/bosch_jigsaw_guide_rail.pdf
    • https://uploads.strikinglycdn.com/files/f7e214dd-6d0c-4240-b059-e217257e70d5/analisis_de_fourier_hwei_p._hsu.pdf
    • https://s3.amazonaws.com/lokijuronig/platform_ankle_boots_new_look.pdf
    • https://uploads.strikinglycdn.com/files/e8682b33-400b-4ee8-b548-52807c0a15db/veturi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc1e.bin
07f9ab43dad2ecde1c3be0bcdfc6a0d7f26f14071aa4e74d70150680af8cc77f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1E 5528 bytes
font_01_sfnt_off0000deea.bin
92292ec9c13e89b2f92f76f6d611c1654caf4e766fd61fa219d705c4333f3e52
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 11080 bytes