Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6a819f68b358ec…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 04:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 697c0fc472e3d2ce0662c2b26548eace SHA-1: 87b7cba49f97809b2b155c312057ba265cebdc7f SHA-256: dc6a819f68b358ecd8d9be924c31ed3b18676ce5426a9a2b8570266938cd7f19
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is used to lure users with a keyword search for 'states and capitals of nigeria pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure.

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.ru/pify?keyword=states+and+capitals+of+nigeria+pdf In PDF document text
    • http://files.rattlesnakesafe.com/uploads/1/3/1/3/131398357/5627392d00ed0.pdfIn PDF document text
    • http://files.sheercrystalbellydance.com/uploads/1/3/0/7/130739945/fajij.pdfIn PDF document text
    • http://risab.mysteriousmisterenter.com/uploads/1/3/0/8/130813765/fixomesofaji.pdfIn PDF document text
    • http://wubavevif.deaconmichel.com/uploads/1/3/1/3/131383483/fulenudanowipew.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/1/0431/9805/4558/files/juzafak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/dukelobiniditikotawalot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3811/files/96399121790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/koraxomebediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/59699816616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/99489667833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/lofavuxoxes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/labipavolobafixojosuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/country_code_56.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/immersive_patrols_sse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5109/3914/files/update_xbox_one_controller.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 5

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_off000060fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 5424 bytes
SHA-256: 34743726d1d712517cd66135dc0b973a9eac3c024f5999165d79b84b8297695c
font_01_sfnt_off0000737d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737D 10112 bytes
SHA-256: 8901e2fb94a94b6cb38a80d39d2694f5c5f411528a9a2a510733842d09f1b642

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