Malicious PDF — malware analysis report

Static analysis result for SHA-256 190c57c9fb7a32a6…

MALICIOUS

PDF

37.3 KB Created: 2020-08-06 08:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c19887b4c3f3a4c6e1dec09be87bf910 SHA-1: 52955fb1fb6e76c37c6834eb254959799cf746de SHA-256: 190c57c9fb7a32a659a87ab2d80e5500751a650c14e77c7706cb4dd7ae9fa4d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as legitimate downloads but redirect to malicious infrastructure, specifically a redirector at ttraff.com. The document body and heuristics indicate a lure for free downloads, likely a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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=bescherelle+conjugaison+pour+tous+pdf+download In PDF document text
    • http://files.makerteacher.net/uploads/1/3/1/4/131409761/nifokativubozuv-vugojubudunofes-sijuziledizu.pdfIn PDF document text
    • http://files.beaconbeerco.com/uploads/1/3/1/6/131606393/a9ebc51937.pdfIn PDF document text
    • http://kitikume.dannguyenportfolio.com/uploads/1/3/1/4/131408100/gorafatirisiwaxelu.pdfIn PDF document text
    • http://zunuj.gokiting.com.au/uploads/1/3/1/0/131069934/8246408.pdfIn PDF document text
    • http://files.ksdgroup.com/uploads/1/3/1/4/131438211/jimem.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/1/0431/1236/6241/files/moxebedisofok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/16425977272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/80712356706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0963/7530/files/67394340578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/virul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/13210863745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/69086072303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/zuxamegubekox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/luxusituper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1059/4728/files/firework_animation_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/kalajogelezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/97062454163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xuzefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/mp4_bollywood_movies.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_off00004ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF1 5636 bytes
SHA-256: 1fb4159dc4d7b45a1ea8dad6681661b94a07817cca54f1f84f7cb4d7f338e6b1
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 11252 bytes
SHA-256: 30f9294ffe0cbcb78a2cdff534984340c7dd152eb8144464b097a898eb96c709

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