Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf46404aa4e18833…

MALICIOUS

PDF

34.2 KB Created: 2020-08-02 18:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1316b895fa261bc3c992b15778aedbb3 SHA-1: d8795705cfedfa08b62c28dd15afce0be2822d12 SHA-256: cf46404aa4e1883376a30406f213d10b32ad97a86ccbff1ff1ab32673bf3293e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=discovering+psychology+5th+edition+pdf', which is designed to lure users into downloading potentially malicious content under the guise of an academic resource. The ML classifier strongly supports the malicious nature of this PDF.

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=discovering+psychology+5th+edition+pdf In PDF document text
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdfIn PDF document text
    • http://files.thermotrix.com/uploads/1/3/1/4/131407734/12612e9.pdfIn PDF document text
    • http://files.artichokegallery.com/uploads/1/3/0/8/130814297/rojiz.pdfIn PDF document text
    • http://suseroka.stjohnpaulstamps.com/uploads/1/3/1/4/131407263/7e5f74d8.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/1/0433/0687/7080/files/wevola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/open_google_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/chp_traffic_incident.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/ford_edge_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/27554474111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/noxezeperunepute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/pebuxerezife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2027/8171/files/10065903980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/54792872008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/san_anderas_mod_installer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/47230881449.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_off000049de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DE 5492 bytes
SHA-256: 9626e4998425d5ba63008438315f1d97a57fc053d1e66cce73fb1bf06ee3a6b2
font_01_sfnt_off00005ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA1 9116 bytes
SHA-256: 79d532ee183b8f8bde00e9508afaf56a1466c09db96f7b337b6d51931455ef35

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