Malicious PDF — malware analysis report

Static analysis result for SHA-256 b335aadbac4b2216…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 13:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2994fe6fb7fc61547c4053208eac83f0 SHA-1: 6a15c8da5addb2fa429a372426142c39d7e6206a SHA-256: b335aadbac4b22168d2e9f073cef18a53182e4be89542d92d4bef5498ca993ac
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=high+school+drawing+book+pdf, suggesting a lure to a malicious site disguised as a drawing book. 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.com/pify?keyword=high+school+drawing+book+pdf In PDF document text
    • http://files.sp-arms.com/uploads/1/3/1/1/131164236/dufuzewajajavokak.pdfIn PDF document text
    • http://files.scribeathisfeet.com/uploads/1/3/0/7/130739951/zizupilusifax-bazogike-xifugizib.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/1/0434/0423/0805/files/71308685949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/62710052200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19490865332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/mevusurivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/muscle_gain_workout_plan_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2956/9429/files/jubufabeguwavujogule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/hudson_park_pima_cotton_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/paradise_lost_milton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/6449838571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/3d_model_cars.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 4

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_off000081cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CC 5672 bytes
SHA-256: 045c7d1df974d697ed417f5b27c017b06fb8cb9d079fa5d2af1b7e68f1aa58c1
font_01_sfnt_off0000951a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 10120 bytes
SHA-256: ba81422ef750d6755262467ccf0c9fa68c76073ca689c4558ecffd4c6f284458

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