Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df8a1da65813f5f…

MALICIOUS

PDF

77.3 KB Created: 2021-01-06 22:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325f055e790b43d333df24b0782d3019 SHA-1: 727bfbd0e1960c3626b5d2da4b7684aa3aa8a28a SHA-256: 7df8a1da65813f5fc463878596720e54844c7d5dcb642716f9d958ee51470e04
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, many of which are hosted on link farms designed for SEO manipulation. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ggtraff.ru'. This suggests the document is part of a campaign to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://ggtraff.ru/aws?utm_term=guider+aither+review
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/zewasiwimitu-segef.pdf
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/4ea2211d812.pdf
    • https://cdn.sqhk.co/nokotadi/ib1hihb/street_outlaws_drag_racing_schedule_2019.pdf
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/xesef.pdf
    • https://cdn.sqhk.co/bivosozos/YeqDDGI/multicraft_login_voodoo.pdf
    • https://fubuzupa.weebly.com/uploads/1/3/5/3/135324320/bivug.pdf
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/0da79c091fabba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bovenotojitowe/50480838709.pdf
    • https://uploads.strikinglycdn.com/files/1ee9525e-9cb6-4462-8765-db14e99e4b7d/leeson_single_phase_motor_wiring_dia.pdf
    • https://uploads.strikinglycdn.com/files/99005604-70ca-4750-8a02-39b4613866ef/zazukak.pdf
    • https://uploads.strikinglycdn.com/files/dda0d430-ea87-4764-9fc9-1ededc6271eb/savvy_book.pdf
    • https://uploads.strikinglycdn.com/files/e208de59-29a8-40c9-b6dd-19401ec59920/love_story_lyrics_yelawolf.pdf
    • https://uploads.strikinglycdn.com/files/6a419d00-c8fd-4a8f-84cb-2a39e16cb768/gC3BCneC59Fi_beklerken_10.bC3B6lC3BCm_indir.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/hiroshima_peace_park_japan_guide.pdf
    • https://uploads.strikinglycdn.com/files/68e6dade-f611-495e-be04-36c90284e1ee/24768942879.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_off0000f2bc.bin
547ace76b35ccace5176003995445e7bf2f0eff85f93e7dcda047ff8f5c98ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BC 4888 bytes
font_01_sfnt_off00010365.bin
d61e63aa822a398c2a9c765bd37053ab013b899eda07cd7e4671cfba43e3b76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 10784 bytes

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