Malicious PDF — malware analysis report

Static analysis result for SHA-256 4592dad22743455d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-24 00:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39e0f51dbad80f3b017bda54eb703418 SHA-1: 4dd4803d10a3950e30491bb0dd4bbcd844206374 SHA-256: 4592dad22743455d94cf81136c629ccde8428ae7e146f6e3602802a0560b4192
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO poisoning or link farm attack. The primary malicious URL identified is ttraff.ru, which is known for redirecting to potentially harmful content. While no scripts were extracted, the document body and embedded link structures strongly indicate a malicious intent to lure users to external sites.

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=states+of+matter+simulation+worksheet In PDF document text
    • http://files.taylorcraigsutton.com/uploads/1/3/1/3/131379356/lefobujapelis-xibimibop-rebizegitose.pdfIn PDF document text
    • http://bixasew.msjoneslab.com/uploads/1/3/0/7/130775169/1656899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6743/9264/files/36243250685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6497/7560/files/timizexaxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/algebra_1_volume_2_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/descargar_mapa_carreteras_asturias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5322/3829/files/74554233794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/fragrant_branch_of_yore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/sowibupekip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/78359863479.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 2

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_off00005d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D69 5148 bytes
SHA-256: ce60dc0e84f0042518b12b7b11ce44bd424bd32c642b6001891174f129fdf14c
font_01_sfnt_off00006ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 10132 bytes
SHA-256: 7e81a15859ac216379745ca474323b312a743107410d7269a541c75ae85bbb08
font_02_sfnt_off00009172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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