Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fc80cd6813f03f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3239e4fb6029bd5596e7eae4204ee4b7 SHA-1: 98bb3ef2ccb63ab91825ca2f9383e1aa495cf3b1 SHA-256: c4fc80cd6813f03f8a106a7620499477dfc1494ebca1fda075cd49d20406b641
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary redirector URL being https://ttraff.cc/wb?keyword=question%20words%20exercises%20intermediate%20pdf. This heuristic, combined with the ML classifier flagging the document as malicious, strongly suggests a phishing or malware distribution attempt. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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/wb?keyword=question%20words%20exercises%20intermediate%20pdf In PDF document text
    • http://files.2018flyballnationals.org/uploads/1/3/0/7/130776268/kidipu-pevexutitumixo-zidelusowav-dugomuremere.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/1/0431/4211/9592/files/sogasubifedopowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/sawogeteserixugunupib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/5951590987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/35134328316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/56859521066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/42630077506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/5436768323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/53476444542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/ribazewanuguxojexuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/bassoon_orchestral_excerpts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakoximowukod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/8030269247.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000507a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x507A 5492 bytes
SHA-256: d78021e3a4fcfaa7b2208842ec47cdb60797d839865adbdc8a1934ff0aadf949
font_01_sfnt_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 10028 bytes
SHA-256: 6618fd15c6f58c2140078bc42a55a5932e59bf0863f9f2815ff6fa0069a4455d
font_02_sfnt_off00008563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8563 16096 bytes
SHA-256: 67fbccdfc1673e1f05ec910dc9703220f17c769013ad8a8c66a56881809b461c

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