Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcd1c20c2899668…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 12:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9437bc939dc5b0857256e528ddab2ce SHA-1: bc8c640238dfd32e79171843b7eb9c3a917308b9 SHA-256: 1dcd1c20c28996683d540b7605e0f967bf21f974e18d239be0166066e79956a3
194 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external PDF links, characteristic of SEO link farm abuse. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users through the ttraff.ru domain, which is associated with malicious activity.

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=catalysis+in+inorganic+chemistry+pdf In PDF document text
    • http://files.odbweldingwerksfab.com/uploads/1/3/2/8/132814196/06a46a22b2.pdfIn PDF document text
    • http://nolewafux.matersports.com/uploads/1/3/2/6/132696030/4307779.pdfIn PDF document text
    • http://sowun.moniamotorcycles.co.uk/uploads/1/3/2/8/132814930/3145204.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/1/0431/4651/0504/files/tetogajadutifozamedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/79367592781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/ripebogebuniki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/anestesia_general_odontopediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/noren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/zuzulavisujim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/34021297137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/runescape_goblin_diplomacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/linuxo.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 7

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_off000065fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 5576 bytes
SHA-256: 8a54b18a689ae9ecf5eeddedecb03908cdba5946a089df5e79cb3981a9371a13
font_01_sfnt_off000078c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C4 9948 bytes
SHA-256: e27c2d97d90d9f523f78c926e6f012716437b9ff2e9c6a3f2a61296ffb336131
font_02_sfnt_off00009afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 16128 bytes
SHA-256: bfd634d3712c487d932e69a042cdf52523effffc397806a4650b0c914fa2b1d4

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