Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9dc911ba99a32e…

MALICIOUS

PDF

55.5 KB Created: 2020-08-23 03:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8bd59a9381bbbea7a4a3968ffa37ab4 SHA-1: 12d47ee1241d3ccb0e0a9aacb2a01c8cb34a9277 SHA-256: 4f9dc911ba99a32ec50cdaed49cd7ad4de468807dd1382b2a8c2941dc9915015
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a title related to medical guidelines, likely serving as a lure. The presence of numerous embedded URLs, many hosted on Shopify, suggests an attempt to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=aha+guidelines+for+blood+pressure+management In PDF document text
    • http://files.fjdzinc.com/uploads/1/3/0/8/130873718/mitub-watove.pdfIn PDF document text
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdfIn PDF document text
    • http://defoki.shalomfoodpantry.org/uploads/1/3/1/0/131070588/7643157.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/1/0428/9835/8432/files/65294746239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/17319512791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/kinagibibagovobobafiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/refractive_index_of_water_and_oil_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16994954809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/dtv_channel_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/33950075704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/fajoduvekevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/action_speak_louder_than_words_song.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9905 5584 bytes
SHA-256: c57036c3fd01da7fbbde73faa7a690bd8c9a82161feb668bf70bacf07a7bb402
font_01_sfnt_off0000abce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCE 10908 bytes
SHA-256: 83a09c6ba44104d8927fca7db0e0c807090d528bebf9ada10602cf1ecb6eef02

Open this report in the interactive analyzer, or submit your own file for analysis.