Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4442ecae0e93cd6…

MALICIOUS

PDF

35.1 KB Created: 2020-08-04 17:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec3f719c030dded55151118e7e4be299 SHA-1: 4ab3a30bb01decc7d2d8b80ece57f6a8fb0d5c35 SHA-256: c4442ecae0e93cd6a2c1d773a163a9cfcc1b9788787ed6277c8058b6c3a054a0
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one that redirects to known malicious infrastructure. The primary malicious link is https://ttraff.com/pify?keyword=math+for+economists+pdf, which is likely part of a link farm designed to lure users into downloading further malicious content. The ML classifier strongly supports the malicious verdict.

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=math+for+economists+pdf In PDF document text
    • http://files.paulwilkinselectricien.com/uploads/1/3/0/7/130738569/267d3d0c59b588.pdfIn PDF document text
    • http://files.qualityparks.org/uploads/1/3/0/7/130776033/4920650.pdfIn PDF document text
    • http://files.triadblackhawks.com/uploads/1/3/1/6/131637402/govevarudinov_jumuturugon_bavivetejepepoj_tekajubivup.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/1/0440/7237/0326/files/424079113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/rukaposupesorokifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/xiraxuvubevegevimulaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/28167540861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/extract_email_from_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/saketabanevoselujavadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/jusovajiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/geladixegiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/timuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/45676439952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/35193578592.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 2

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_off00004ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA4 5368 bytes
SHA-256: 0358e5e1b6ff481e81f121cefdd5c25b70bcf28b27626053dad5f9ca0415ffaf
font_01_sfnt_off00005dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 9996 bytes
SHA-256: c6fc4c9b3e29e1d70e7473e655013d6940ead7d392c742013105d4cea1f3c130

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