Malicious PDF — malware analysis report

Static analysis result for SHA-256 50cf4f1afb18ee3b…

MALICIOUS

PDF

53.0 KB Created: 2020-07-30 08:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c52db719be31efc31e36b9fdf10f84b4 SHA-1: 26f464fa021e30cd21165b8b6910daa632d4cce0 SHA-256: 50cf4f1afb18ee3bc2d3bf511e8bee95e14812911239adff05a218f5c166dbf1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'calendar 2020 pdf'. The primary malicious URL identified is ttraff.ru, which is likely used to redirect the user to a malicious payload. The presence of a link farm further supports the delivery mechanism.

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=calendario+2020+por+mes+pdf+para+imprimir In PDF document text
    • http://files.lesswastemorecommunity.com.au/uploads/1/3/0/7/130775518/7101315.pdfIn PDF document text
    • http://files.smokefreebyattrition.com/uploads/1/3/1/6/131637658/45adb6b.pdfIn PDF document text
    • http://files.federfarm.com/uploads/1/3/0/7/130739926/6ffda04ba.pdfIn PDF document text
    • http://files.mountainsandmolehills.org/uploads/1/3/1/4/131453177/2877163.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/1/0434/9244/2264/files/93469208232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/jixusizajikajusuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/92914256944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/lujodukonixutokorupato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/43130615238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/70534228388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/30624604149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/gadekusutiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/57805294806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/78662649368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/35878563109.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 5192 bytes
SHA-256: 6eb44e014ba940c7812adb8301007def7765fe9e62088fd8cbcdfde2807c91d2
font_01_sfnt_off00008a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A57 11424 bytes
SHA-256: d08fe587319e5fb29280b291f8c050c8352e01da3ba536ac0ee82e6329db43ec
font_02_sfnt_off0000afba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBA 16436 bytes
SHA-256: 24baddaed424bc029a81597139cab15ff5209d7d3a0634b7cb16d25bc132c1f0

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