Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8ef72772050cb7…

MALICIOUS

PDF

84.8 KB Created: 2020-12-16 23:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2dd16483f1dc77930e4bebc966baa0e0 SHA-1: 76554b0498dcb4db070a217fccd8bcabfd3aab38 SHA-256: 3f8ef72772050cb700d9eac28f36a9fb2fb584473b3fecd043ca87b34a03a52b
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to redirectors or SEO farms, indicating a phishing or malicious download attempt. The primary malicious URL identified is traffnew.ru, which is likely used to host or redirect to a malicious payload. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=beck%2527s+big+break+hug+season+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487897/normal_5fc168ba7a9c7.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/college_board_website_sat.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/b44808067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f8bbd8ec0648.pdfIn PDF document text
    • https://jexedijelewa.weebly.com/uploads/1/3/4/5/134518212/kenevekazimepo-wotir-woberegazoku.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/sibatupodelukafabi.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/6508997.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/sanosadanonafakifo.pdfIn PDF document text
    • https://s3.amazonaws.com/mupuraregonu/wazijip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5c2e58ef7301f8b324c67/t/5fd0a4923bcf75077a86ee19/1607509138741/celebrity_cruises._co._uk._drinks_packages.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc148d1e18c5c478e2b71ff/1606502612353/kopoxijatolivuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd006b45ca4f790266bfdb/1606221931719/98591876780.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50ae4a13a450bab0f051b/t/5fc5b8fdbc819f1cf49ec41c/1606793469640/gosavusudawibigep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066af4f5-418d-45ca-8e49-1598f2fcb5c9/75315715062.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AC 3244 bytes
SHA-256: 74f8d12cbef5a8dc4862e862f4233220dee491c583c713b8cbe8826d1badf724
font_01_sfnt_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 5368 bytes
SHA-256: 0a1fd4a66e27616c5714926efd763a85e41b2783c8048a665db4ed5ac462935c
font_02_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 14960 bytes
SHA-256: 7f6e7d9db0ce0d84f95cd893cfda045e05ebc521a6a8deac154ba1b420e6c957
font_03_sfnt_off00012f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F02 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df