Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7fde5257d0c07c…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 21:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38f82e8d8610b9d147451cd86ed55245 SHA-1: 2db6ae731bc17bb9350daa7aeb13ee4ef1f66e2d SHA-256: dd7fde5257d0c07c2b8f1e0912154978b45eeb8101e809d4f3a3cee68ebcc6d2
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=best+4k+video+er+free'. This suggests the document's primary purpose is to direct users to potentially harmful websites. 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=best+4k+video+er+free In PDF document text
    • http://files.sydneyaudioclub.org/uploads/1/3/1/8/131856492/236d1.pdfIn PDF document text
    • http://files.declanwrynn.com/uploads/1/3/1/0/131070204/40633.pdfIn PDF document text
    • http://wafufi.discoveringtheremarkable.com/uploads/1/3/1/4/131438392/d9be1fa39e.pdfIn PDF document text
    • http://files.portlandtraumarecovery.com/uploads/1/3/0/7/130739155/julubokodikiz_migegiv_leseraso_vogono.pdfIn PDF document text
    • http://files.jessicageoff.com/uploads/1/3/1/4/131438111/efb4375d.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/1/0433/4118/5189/files/87683166107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8841/6663/files/51236035101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/34070393221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/zach_eflin_fangraphs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/cbx500_datalogic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/484992922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5403/3054/files/brian_tracy_books_no_excuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/young_living_essential_oils_product_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/46503136754.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 6

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_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 4920 bytes
SHA-256: 36b45d46d180ab8a1a4cb18d0e5c2ea057b2b2a1e8cf69831a05df8467daf10f
font_01_sfnt_off00007054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 10220 bytes
SHA-256: 1e566a61eb58b5cdea7179faa33735613cd68c92aed5382f9df94347a88b3474

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