Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f52cea9cdd4d425…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 18:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ec91c87130101436dd76c9d7e1e759e SHA-1: 9d2bfc51fd44f719f3d76c1f745490038440489c SHA-256: 2f52cea9cdd4d4253bbd5f9b752a0cbcfcc7c1d60f0506926a893a9731fb37c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Nsf biosketch template latex', suggesting a lure. The presence of a link farm and a high ML classifier score further indicate malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.
  • 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://ttraff.com/pify?keyword=nsf+biosketch+template+latex In PDF document text
    • http://files.myjesusdream.com/uploads/1/3/2/6/132680994/kasufowokilefo_diwurefewoviguv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/42381445466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/87271776680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/89049856719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/40378141988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/nurew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/98258416526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7746/files/50195957700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/sobegimofazafolaravu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/bijoux_victoria_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/integral_calculus_by_shanti_narayan_and_mittal_download.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_off0000563f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x563F 5400 bytes
SHA-256: 183e549969ba4e87e154fa8423aab5c71bbb14df7182e8c5122280791e1585ce
font_01_sfnt_off0000687a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 10452 bytes
SHA-256: c80d732661e49e5aad9c0eac100c30b159fc5b5a387a332bd3d7134ead3e5473

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