Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24320b45671c21c…

MALICIOUS

PDF

56.6 KB Created: 2020-08-20 13:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61335ed02719291ef1e5064d0148821b SHA-1: daff26e38317ce9e54c94829f5e2056e7e4d2a60 SHA-256: a24320b45671c21cd74b4fe01bba7929c46961d3e723465f60944bb23ce0b6c0
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links pointing to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=cron+job+time+schedule+format', is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains references to URLs, reinforcing the malicious redirection pattern.

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=cron+job+time+schedule+format In PDF document text
    • http://files.nickygibbsdance.co.uk/uploads/1/3/2/6/132681409/1730420.pdfIn PDF document text
    • http://files.jessiedallasdesigns.com/uploads/1/3/0/7/130739084/jawibim.pdfIn PDF document text
    • http://files.emotorcontrol.com/uploads/1/3/0/8/130814042/3991319.pdfIn PDF document text
    • http://wapeloke.heatherchrisler.com/uploads/1/3/1/4/131437987/sajafekavi.pdfIn PDF document text
    • http://files.westech-rides.com/uploads/1/3/2/6/132695932/kobuzitigi.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/1/0440/0313/1542/files/solazilak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/4981716563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/83401456794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/54220087464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6791/6696/files/kuxibirupukafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/42120290421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/lutexarijibexe.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_off00009803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9803 5384 bytes
SHA-256: e0d8de8f040787ea1fe0346084dc8f721e236fe4785ef99d981416bfadaa9f8b
font_01_sfnt_off0000aa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1C 13260 bytes
SHA-256: e31f242d8f336e5fa86baefc70660589961d96e2969550894bbc066352f9ce00

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