Malicious PDF — malware analysis report

Static analysis result for SHA-256 39498c87d1b39e3c…

MALICIOUS

PDF

39.0 KB Created: 2020-08-04 14:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00a25479e8a339eb4e7a268175671996 SHA-1: ade52c1f9576ea5c14c412059031fba687d8c8be SHA-256: 39498c87d1b39e3c755a70a3752b823e192a8f8eea60ac3c1d9a25afa59e68cb
202 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body also contains text related to converting file formats and a call-to-action phrase, suggesting a lure to download or view a file. The presence of a link farm further supports the malicious intent of directing traffic to potentially harmful content.

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=convert+cdr+format+to+pdf In PDF document text
    • http://files.benshairstudio.com/uploads/1/3/0/7/130739340/febotu_putugunet.pdfIn PDF document text
    • http://files.azheatblog.com/uploads/1/3/0/7/130775806/zofibagaluwaregetav.pdfIn PDF document text
    • http://files.lemroyaltyfreemusic.info/uploads/1/3/0/9/130969327/fajipafitu.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/1/0431/2032/8864/files/fixogixagemujowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/59156709989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/tanuraxuzifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/jixejapemojurifupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/kekisilidilon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/belaying_pin_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/minecraft_fantasy_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/jofimoxofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/the_light_between_oceans_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/wifugiroguropowilated.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/70809581578.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 4

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_off00005bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD1 5056 bytes
SHA-256: 174f52614ed28d84e1ce23ea71361dc9b2a4d7213bcf32978b5d317324b1ea92
font_01_sfnt_off00006cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF1 10076 bytes
SHA-256: 910304b30dff669ef30d7241a265fc8d9de82fdcbb2c37fb8ae187781f568399

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