Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c14be2683a29c1d…

MALICIOUS

PDF

69.6 KB Created: 2020-12-19 22:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f3cace37c43a60b420133f4d6b30d66e SHA-1: ee0a20c9c622dc38fc88ceef33d999c624ece056 SHA-256: 8c14be2683a29c1d003f5663057932b1283e717b235692f9f52dacef26b34739
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of an SEO link farm designed to redirect users to malicious sites, specifically identified as a phishing lure. The primary malicious URL is trafftec.ru, which is also flagged by a heuristic as an SEO redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/123?utm_term=bear+hunting+season+vt PDF link annotation
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/vazefobizesekewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_5fa30ee45299b.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/6f4cfca1-35df-44cf-9508-0a28f420360f/2004_ap_chemistry_multiple_choice_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdf3994-579d-4a99-bd04-42bd99e5fc58/pukuripinukudolefaz.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/articles_rules_and_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/soap_opera_games_and_trivia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ad3f5a-0ed4-413d-89e9-9a1914e4cd23/82869838945.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/dixasiwigikumalutavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c74592-8f84-4020-9727-4e9269c4c547/56436202739.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/82840747497.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/cartola_fc_dinheiro_infinito_apk.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62B 4904 bytes
SHA-256: df3a8214c7be20a061a1756e53bbbeb13365b675c319e8c0e0c5c6b3d062ed58
font_01_sfnt_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 10944 bytes
SHA-256: 81142b4cdfe9e09f3153e669803a03a23865ab859903e4f3851616d01d8fd896
font_02_sfnt_off0000fc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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