Malicious PDF — malware analysis report

Static analysis result for SHA-256 7643b9f5f2652ec3…

MALICIOUS

PDF

68.8 KB Created: 2020-12-27 00:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fa9356f84006aa300826783881e25d1f SHA-1: ccaac86bfeedc07ed08051f6ca26f2da9800fdcf SHA-256: 7643b9f5f2652ec3e50fce5373feb2f954482794ff2524f7a2332aedeee3ccbe
214 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including a critical finding for a PDF redirector link pointing to 'ggtraff.ru'. This indicates an attempt to lure the user to a malicious site. Additionally, the PDF contains a large number of external links, suggesting it may be part of a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=blue+bottle+jellyfish+sting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f9cbc0c9bcb7.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/hhaQwmS/representative_democracy_meaning_in_history.pdfIn PDF document text
    • https://nilowebun.weebly.com/uploads/1/3/4/7/134751503/7c4b225bf.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/lezerivaze.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/cqhfib0/weapon_builder_simulator_free_mod_apk.pdfIn PDF document text
    • https://pisolapep.weebly.com/uploads/1/3/4/6/134648883/sumesikesoxuretuli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/agenda_2030_y_ods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34db1a32-a5a8-4fd7-9380-a72e1d96304c/zazafox.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/blood_donation_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/football_games_axis_football_league_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/kapopetoxekenorutifika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672e658d-2981-4648-9280-cde7d0623782/jinat.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 5092 bytes
SHA-256: b8e4f360ff06ff334c912179cdd8f8572685839999a9754b380218d691bde872
font_01_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 10204 bytes
SHA-256: e677b3dfb46c8d497867e318890f7c1c9db7decc9f7a0cf361cb2b687e486432

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