Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fd3c978eff98cd…

MALICIOUS

PDF

58.3 KB Created: 2020-08-08 07:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f251fca36df64637b251a60a6f9bbe5 SHA-1: e6ba68854276b1c060ecd7cb813dae591242a13e SHA-256: 84fd3c978eff98cda2ec793acf56ba2f457466f80600799c4a41f217ad7e18f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body and heuristics indicate a lure for free PDF downloads, likely leading to phishing or malware. 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.cc/pify?keyword=the+story+of+an+hour+free+pdf In PDF document text
    • http://zawarit.aya-technologies.com/uploads/1/3/0/7/130739616/buxukuzit_tubugewave_rijiw.pdfIn PDF document text
    • http://files.red2green.org/uploads/1/3/2/6/132695273/tudanibaruweker.pdfIn PDF document text
    • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdfIn PDF document text
    • http://files.mtbreizen.nl/uploads/1/3/1/3/131383934/gifuza.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/1/0435/6957/8147/files/advanced_articles_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/82328062887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/85704528457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/loniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/50375053130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/frost_relic_risk_of_rain_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/gewume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/11042518736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/writing_ielts_band_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/pibokipegixabetepakemepab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/bafepajadutotowot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/oregon_trail_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/dotakoregufokudosoz.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_off0000a207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA207 5148 bytes
SHA-256: 367807a9afdf725b968cc0e29401c1c0f64db7fcccb0a1e2ef9054d059dd8522
font_01_sfnt_off0000b38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 12584 bytes
SHA-256: f4c0b1dee8074b649ee043686c9284c7c9f5b5480f1a71b068e50eea0fbd73e5

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