Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb64bee6a792f84…

MALICIOUS

PDF

47.2 KB Created: 2020-08-10 05:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5afa3d9bf1f8295962ca77e600940eee SHA-1: c6c8da64b1e1111afc29b61b83880b5d2e9e87c5 SHA-256: 1fb64bee6a792f8415610a36a4d4ceb0f546cc66c6e6462051973b38caf08959
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the redirector. This indicates a phishing attempt designed to lead the user to malicious infrastructure.

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.cc/pify?keyword=brute+force+algorithm+pdf In PDF document text
    • http://files.stephaniesmithshowdogleads.com/uploads/1/3/1/3/131380297/564453.pdfIn PDF document text
    • http://files.kamarisoul.com/uploads/1/3/2/6/132681452/tunefenas-razagowujugitug-dugoguliboxa-rofefikegalemug.pdfIn PDF document text
    • http://files.karoobirdingsafaris.com/uploads/1/3/2/7/132740277/bukis_tunivovumeja_lasazo.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/1/0432/6644/1376/files/bexujonom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/trilogia_bella_y_bestia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/47610047671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/81175411155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/lalazikepavewopoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/88286527190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/gufinorexipupotapanojodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/8052263360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/zulavaxaronemamovuxam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/como_encontrar_el_sentido_de_la_vida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/bejedelex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.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 4

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_off00006cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 5216 bytes
SHA-256: 9f037ca6fdb1681b6dacb29ff94888f3b937071b29d0f2c20d4dbdb11962fe5e
font_01_sfnt_off00007e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E78 10344 bytes
SHA-256: 129e3b78f73488939560bbfcbfb74f8e667bc3a1e164dc6ae56ac6a051b25319
font_02_sfnt_off0000a1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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