Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddb41e3bfe0e01e…

MALICIOUS

PDF

63.9 KB Created: 2020-08-05 08:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd986c93fd902f406c3b779751d39cb0 SHA-1: 3bf0da493c90b3cd26c7032a4ab666727350f79e SHA-256: dddb41e3bfe0e01e3cbcc8ce4edb7f9a72fe926ebadb5cc985c4d2409a1e667f
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=carrom+rules+book+pdf' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack.

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=carrom+rules+book+pdf In PDF document text
    • http://files.annapicklesharvey.com/uploads/1/3/1/4/131438111/dinizagopizotu.pdfIn PDF document text
    • http://files.malnomusic.com/uploads/1/3/1/4/131414240/pesikenudeparu.pdfIn PDF document text
    • http://files.raindanceh2ostore.com/uploads/1/3/2/6/132681294/1124265.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/1/0432/6280/4136/files/74643039601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/kudaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/3536895413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/25512659477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/vogefonogaguguxurez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9352/4634/files/livre_pour_apprendre_le_franais_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/robibuvologoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/72692988866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4216/7194/files/vmware_fusion_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/nijom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/92522940245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/puzegiririjobomod.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_off0000bf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7A 5296 bytes
SHA-256: a8ebf651a409b2f9c99f2a2515a9d80390ca9ffe80c052def57bb0f587c0a47d
font_01_sfnt_off0000d15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15D 9780 bytes
SHA-256: b70c382b8d1a07335dd37d005802b2d81e9c94847786f39ce287898f16e707d0

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