Malicious PDF — malware analysis report

Static analysis result for SHA-256 4538a5944889ad1d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-20 09:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa8bfc8ab3dd8bc93874719229989dfd SHA-1: 73956be9bb0ff985502ebfcbf080789a37ee8be4 SHA-256: 4538a5944889ad1d0ff6db39ae2884e3cbac698d7ff116a1b3ebb7f63499c780
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm and a specific malicious redirector URL, indicating a social engineering attempt to drive traffic to potentially harmful sites. The presence of a download button lure further supports this. The primary malicious URL identified is https://ttraff.ru/pify?keyword=free+music+videos+for+mobile+phones, which is linked to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.ru/pify?keyword=free+music+videos+for+mobile+phones In PDF document text
    • http://files.clearmindpsychiatry.com/uploads/1/3/1/3/131383255/7070463.pdfIn PDF document text
    • http://files.suemediaproductions.com/uploads/1/3/1/4/131482959/96ae9ac1.pdfIn PDF document text
    • http://files.stephenjewellcreative.com/uploads/1/3/1/4/131438282/523226ff21c4adb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/33872102977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/fiwepisikopapumapowuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/tratamiento_varices_esofagicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/69279443902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2244/9814/files/jilevopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/foremupubabixufagevagexur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/rent_agreement_format_pune_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/56337997553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/guitar_backing_tracks_software_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/44198293549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/balu_mama_song.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 7

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_off00007e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 5340 bytes
SHA-256: 89a5283aee4eb27ac0561765d7b2c67586bc89e52898c4ed4200deb7cd7c52cc
font_01_sfnt_off00009070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9070 10120 bytes
SHA-256: 93a8f1b2c9add8d6a3c5a1924f9dc89855fffa6b63a3625a8157e48a1c39be7c

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