Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12499b76f238478…

MALICIOUS

PDF

66.4 KB Created: 2021-01-06 02:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bb90d7674a2e24126b1a5151bf143fb5 SHA-1: da081275c33709f182dc4aa9c71ec2163947df33 SHA-256: f12499b76f23847839ab17e7ef95989f198ecb1d84baaff227a7e1810895f43f
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links that redirect to known malicious infrastructure, specifically a redirector at 'traffine.ru'. It also includes a large number of links to external PDFs, suggesting a link farm designed for SEO manipulation to lure unsuspecting users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/aws?utm_term=telecine+play+filmes+online+apk In PDF document text
    • https://bigarafomamuwi.weebly.com/uploads/1/3/4/3/134318607/fe08446346039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fd30d58eb561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_5fd8600cc599c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5ff14a8a616c3.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/geTfbhj/furufupukoparobeseseso.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/lIuignt/vexed_crossword_clue_daily_themed.pdfIn PDF document text
    • https://goruxevuretu.weebly.com/uploads/1/3/4/8/134851502/85069571.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/zifilobesumafi/70282056742.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/hack_wifi_password_online_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9bd385-9e6e-4ec0-9787-3657442ba555/drastic_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/68382208919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4012e8c6-d56f-4b8a-b936-f591a499eb86/real_car_driver_fast_traffic_running_time.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/autoloader_bb_z3_terbaru.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E4 5180 bytes
SHA-256: 745a5132380593690a0300a5f26f623eac39304ea43d72afb32cf3fb8ca6fa42
font_01_sfnt_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 11188 bytes
SHA-256: c958dbf4dd9ad7052fc9c9acfde6ea7fb596ceb8c1be6375ab61a975d6a74935

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