Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc6bce09cf83a49…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 13:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 471ad37b2ac6090563314fac8854b2f5 SHA-1: df06c6893ac24296514875b1ad0c2966be991fec SHA-256: 1dc6bce09cf83a49c756accf5c8140358e0bd0db8534bfb750657e02346111ec
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL of the malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to malicious content or phishing pages.

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=edema+agudo+pulmonar+pediatria+pdf In PDF document text
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdfIn PDF document text
    • http://files.snugglehose.com/uploads/1/3/1/4/131437886/jutilok.pdfIn PDF document text
    • http://files.robertoborgatta.org/uploads/1/3/0/7/130776573/5222498.pdfIn PDF document text
    • http://files.sailfootyuk.com/uploads/1/3/1/6/131606175/7744936.pdfIn PDF document text
    • http://files.thesituationshortfilm.com/uploads/1/3/1/4/131453188/jibuwe.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/1/0440/8072/6168/files/lodudewovalesagolefezelap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/busta_rhymes_look_at_me_now_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3468/0216/files/vapidezokewixodutowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/25279537860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7441/0910/files/29391150289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/voxenumor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/gikozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/xavopesuretulosurubeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5967 5020 bytes
SHA-256: 3d862bb3bdcb132aa8ceddd58b8ef2b0bc1d1a4857b5b33dd3bbf7123e5e3661
font_01_sfnt_off00006a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 12992 bytes
SHA-256: 8528532c240ba34b3b7afe82746f3081b92d2c52af307991925ce3c6a70bf5ad
font_02_sfnt_off00009263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9263 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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