Malicious PDF — malware analysis report

Static analysis result for SHA-256 213d79b9e8636479…

MALICIOUS

PDF

92.7 KB Created: 2020-12-19 05:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bc67b768cae969f98dd5a776016ac41e SHA-1: b2897dbfdb524897bb9c82af560669684b9016b2 SHA-256: 213d79b9e863647969e74fa5773bba85f838a2295de08d6fe38f7e9c566430a7
214 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to malicious redirector infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL 'https://traffmen.ru/strik?utm_term=tom+brady+rookie+card+autograph' is a primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The presence of numerous other PDF links further supports the classification as a link farm, designed to obfuscate the true destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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=tom+brady+rookie+card+autograph In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fa3484167925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f920b2463e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fb8bea56bbc5.pdfIn PDF document text
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/5139050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3862b6e5-b47e-4f5f-a4c8-44a0c0185bd0/38482029382.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/best_free_ecommerce_wordpress_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45c9d00-bfc3-4a2d-9c05-04194e8d00ae/81877115732.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/jadezipamifapavofisur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc8630b-2e41-42ac-ab42-a9d0be9463c1/bamavirososokutaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/descargar_whatsapp_web_para_android_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d235ee-68e8-4d8f-981a-882a4a17b863/mike_meyers_comptia_a.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f173f9866f3fd2ede135/t/5fcdeb2924c49707d342693b/1607330601838/vakojobezej.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001278f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1278F 27260 bytes
SHA-256: 1a252ffeab32ad4305921ff8de45da5192318f46f137441f126d7503966f4a84
font_00_sfnt_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 5308 bytes
SHA-256: b06fa6ac88e093e6440418452a23f515abff1e61b48b7bf45f16917e737726a7
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 11556 bytes
SHA-256: ce4613f80d56f5d91fa35bcbfdb66b0df80941ffb7faa14e14363ddf68cd01e8
font_04_sfnt_off00015688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15688 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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