Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fdacee4bea0e1f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-05 15:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 766c04537f2fd3a5d54c646804bb48bf SHA-1: f85763310ef821e5a9d67d7a00511828e5820002 SHA-256: c8fdacee4bea0e1fe203c9290cd10ce31d7de79c0681263432a09774a201001a
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious websites. One prominent link points to 'ttraff.ru', a known malicious redirector. The document body itself is heavily obfuscated but contains references to the 'ttraff.ru' URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious content.

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/wb?keyword=discrete%20mathematics%20combinatorics%20pdf In PDF document text
    • http://files.yallabar.com/uploads/1/3/1/3/131382092/pugamapaz.pdfIn PDF document text
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/1/8/131856160/pemokoluge.pdfIn PDF document text
    • http://fapojoxap.chrome57band.com/uploads/1/3/1/4/131407493/gapavam.pdfIn PDF document text
    • http://files.qizhouxiong.com/uploads/1/3/1/6/131606408/5c08e188.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/1/0438/0894/8386/files/basketball_game_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/wolapepaduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/fipuveregejoseradofaris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/material_ui_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/masuruxevelagetuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/pikuxomefumefolosatopuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1678/0951/files/1905778793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/jifeminagarupexosamibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/tooling_aranda_lasch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/gatebasebolal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/dej_loaf_hey_there_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/44617800261.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_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 5504 bytes
SHA-256: 86560f307b9543c7df3c4aa41f068d1ad3bb3808202acb5c8cc2e515e9d7e325
font_01_sfnt_off00009f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1D 10544 bytes
SHA-256: 0ce1fd8fda708ba09b7cb6a011e6374c64f39bab06905bf9c59440b8a5732176

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