Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a677a6f04bd01d…

MALICIOUS

PDF

42.8 KB Created: 2020-10-28 20:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a2694dfe3acf357f7da704fb8c88bb21 SHA-1: 762a10d599e21d7df2c7926784a055efa32835e6 SHA-256: 90a677a6f04bd01d2d8cd2b036ad44ac46eefd1b04b96bfad3c865bd32c87462
162 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically 'ttraff.com', which is designed to lead users to further malicious content. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful files. Although no scripts were extracted, the PDF structure and linked URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.com/pify?keyword=black+no+more+pdf+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/206da3ae-23f4-4755-a116-868d217563e7/febozezevebibasedufadedaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5004/8921/files/93692375345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1819/8424/files/digital_image_processing_jayaraman_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1075/1126/files/80449711838.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/91532247313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2815/1959/files/fakuwokaliditepibawad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec4d566-bd50-47c1-a74f-75ac13af8eac/diladuluzotinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efe1b7d-86d1-49d0-81a2-28e20e676e8f/79481170732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6926/3003/files/kingdom_rush_origins_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832b5c17-7314-4fc9-819e-b88cd842b7ad/vomenatosisejowoxodosi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/karachi_chamber_of_commerce_members_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2417/0659/files/68284433587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/angular_momentum_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/bidigadeterululilixap.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/63470435212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5702e226-7809-4add-95bf-7d814963d028/warhammer_40k_rogue_trader_free_down.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off0000671d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 5328 bytes
SHA-256: 5082b28bc47db04aaf37ef7e23ea1728dc6a77bd28a4c962af17e0de4063b27e
font_01_sfnt_off0000793f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10844 bytes
SHA-256: 14fb4b9d8e04b6779d835dd5ed5b50bfacd9d7534aafe63c6bce1a87f9afa9f2

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