Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1117926f70ece9…

MALICIOUS

PDF

66.6 KB Created: 2020-11-18 10:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a679723a604135b001072a87f8c4ef07 SHA-1: e314855a604752ca2a517ab9d419c97c6ef782db SHA-256: 5d1117926f70ece909114ad8c07fdcf3a24c7966a95501c57b2f4817add4b4e9
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'traffmen.ru'. This indicates an attempt to lure users to a malicious site, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=courtesy+visit+report+sample In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f9ccfe0bd31d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_5fa42c5843429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_5f9e2df4d6c61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/vekikogokulexupiriri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62eec5eb-77f7-488b-a987-b467a783bca3/botabaranoxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7b4867-d08e-40c3-b59e-77b92954fff1/88084993776.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/hot_rolled_steel_sheets_hs_code.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/76404641998.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/18866154190.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/jama_2012_ards_berlin_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dee8f5d-f22b-41aa-be86-783752e278fd/persuasion_social_influence_and_compliance_gaining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568982fb-93e3-4fe4-ae3a-8ea4e3a7c4b5/figure_libre_streaming_vf.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/food_for_today_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d85901-309c-4bbe-8c3c-f680a2d07ec5/danavinefisilulebufemopi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 5032 bytes
SHA-256: ca5e56431e0950a2f3d631699cb1e939003184329c9cc5d4a20ff6c7f219089a
font_01_sfnt_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 10096 bytes
SHA-256: 4b7afa89f2e9f9ecc71b6ad35daa09e188ec952ac5c3b6c8f4c78a71aa30c6e0