Malicious PDF — malware analysis report

Static analysis result for SHA-256 83399f0c2cf7afaa…

MALICIOUS

PDF

45.0 KB Created: 2020-08-01 09:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d90e80bd25d21d3fb8637c28541fca0e SHA-1: ae22fa7442fe5d11ea94613b92a052433604df9d SHA-256: 83399f0c2cf7afaabd10d16e34dda07d94de35075931a20afa54bc1eeeb2d969
222 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirector infrastructure like 'ttraff.com', which is flagged as malicious. The document body and heuristics indicate a lure impersonating cloud storage services to trick users into clicking these links, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the 'ML_NYX_PDF_MALICIOUS' heuristic strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=how+to+upload+to+dropbox In PDF document text
    • http://files.oogeu.com/uploads/1/3/0/9/130969985/282451.pdfIn PDF document text
    • http://files.brandtechnology.com/uploads/1/3/1/4/131408203/4740797.pdfIn PDF document text
    • http://files.rolypolyproductions.com/uploads/1/3/0/9/130969377/e60e4686.pdfIn PDF document text
    • http://files.carlsbaddesal.com/uploads/1/3/2/6/132681322/girilowamotozafofore.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://cdn.shopify.com/s/files/1/0428/3600/0931/files/92793251961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/40135094990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/multivariable_calculus_stewart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9304/files/99422323277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/gimak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1615/0427/files/xoxizemofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5176/8225/files/revasurevumivofiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6544/9365/files/bazalalevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/62441429528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/tilakenoputafi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 4648 bytes
SHA-256: cec8809d8dae2e83e75e90bcbd7e548b29afbec55b01f6c1efa1112b959b0426
font_01_sfnt_off00007586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7586 10404 bytes
SHA-256: add99cdb8d084308992c0811e096353887538ea4a31d2b3fa92cb1260c427497
font_02_sfnt_off00009919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9919 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e