Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3490d87c3b2dc7…

MALICIOUS

PDF

74.3 KB Created: 2020-11-21 04:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80579ac9f9e8881bd361b814d513c985 SHA-1: f096b4f52823b7a9113094bb7d68754098e63c7e SHA-256: 9c3490d87c3b2dc76eb96b90761a58cc86fc38d7e326eb2dde6d708b00137c5b
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, including a critical redirector link to 'traffmen.ru', suggesting a phishing or malware distribution attempt. The presence of a link farm and a 'download button' heuristic further supports this. Although no scripts were explicitly extracted, the PDF structure and link analysis indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=tfpl+movies+download In PDF document text
    • https://gaxasonazeg.weebly.com/uploads/1/3/4/3/134375181/difewusux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fa9640b8e56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5fadab8a09cde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8851494e2a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f89375049eb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_5fb44adadc612.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://s3.amazonaws.com/remavuj/18092421683.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/korean_for_dummies_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/doxillion_document_converter_virus.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/tokay_gecko_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/xigolokikigokatapiwabiw.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/statistical_models_theory_and_practice_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/fiche_de_revision_brevet_2019_physique_chimie.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 3652 bytes
SHA-256: b3669f80acf99fb8387b809d65fc41257535a12d2a6b809e4905a981e889bbe9
font_01_sfnt_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 4900 bytes
SHA-256: bdcfa7852bda2b291e94bb228a56d9c235bf3e82c53504652b10026eec4e5260
font_02_sfnt_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 10600 bytes
SHA-256: 9232b829eaa0e65ab1cfd960780b61dd3fc4391797821b60b6822ad68850239f
font_03_sfnt_off00010e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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