Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b52f80be4b5f89d…

MALICIOUS

PDF

79.3 KB Created: 2020-12-28 19:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c04916f1a39f89453ab0dc70f2ee493 SHA-1: ed9feb3986d64dcb5c1e6d045b672af85b1745cc SHA-256: 0b52f80be4b5f89dc0fa75a69cef67d04263dd682d11bc23590589d8e8a334a7
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically targeting users with a 'Slack login issues' lure. It links to a known malicious redirector URL, traffmen.ru, which is likely used to funnel victims to a phishing page or download further malware. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to increase visibility.

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=slack+login+issues In PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/bibliographie_ahmadou_kourouma.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/aqkhfhi/depofiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fe60aaf2f0c3.pdfIn PDF document text
    • https://tokenabasefegaw.weebly.com/uploads/1/3/3/9/133999291/wedenope.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/adobe_maker_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5fb2fcaf5a156.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/marketing_plan_template_powerpoint_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/automatic_call_recorder_android_apk.pdfIn PDF document text
    • https://lufalejovi.weebly.com/uploads/1/3/1/3/131380058/3286229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f90a246c7de5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fc924f62d5ab.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/sandhyavandanam_yajur_vedam_morning_tamilnadu.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/ghicdic/hot_wheels_unlimited_release_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47811b4-3e1d-4d2c-ad7e-8b124b5183a1/guideline_plasma_derived_medicinal_products.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fa46bd-147e-4d0c-b16c-11bee581b2f7/starbucks_global_icon_mugs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 5040 bytes
SHA-256: a1a8018edb8f5ac01f22aaa8300841ac825ec92b5f3dc8ab5d78625aef0df810
font_01_sfnt_off0000f72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 10548 bytes
SHA-256: 26d5fe935eef653ddf55afc48d05d91be313908b2352e7dbae046af3813700f5
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 16088 bytes
SHA-256: 700ff7bf493bf9bab5e7bd19ce07725d6ad682c9ec1bd4c381fbd4d74ba1924a