Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a375d239620f85…

MALICIOUS

PDF

74.1 KB Created: 2020-12-27 15:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 516f66fd5505533316ee743d0d6d8ed4 SHA-1: 1cb5a2ea99451a18a60c0d94859b7e0998093f4c SHA-256: a9a375d239620f85a9009b8bee5e5295d39a11ccc9cb0a2a59f9d54ccb326482
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, including 'traffmen.ru', which is flagged as malicious. It also hosts a large number of external PDF links, suggesting a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely 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://traffmen.ru/strik?utm_term=flight+tracker+app+free In PDF document text
    • https://zoxusikajikad.weebly.com/uploads/1/3/4/8/134851315/fakesebeduku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fc6ab0650533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5fd69e476b97d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fa89247028d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5fe561820005d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5fd0d6773ac9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fe7d37e19494.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/nitirew/all_in_one_runtimes_english.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/xewofuzakabaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3934c8-2d26-4da0-93d5-8ce9ae7c9051/mackie_sr24._4_vlz_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af05077e-49a3-4e74-8d4f-6200620f8054/racing_ultimate_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/bharatanatyam_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/zivanebepenovuxopekalapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ab037a-0ff0-44e9-8d09-5c2f92dc8e65/tipuxupofupuwisofefe.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_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 5116 bytes
SHA-256: 2f1c5f10fd0a5141deed5845704207890b57486e2eb034976922715fa2663175
font_01_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 10380 bytes
SHA-256: 5d42e707cda4446313c62f263c7d619538791ea763fe33895613f5895c9736b3

Open this report in the interactive analyzer, or submit your own file for analysis.