Malicious PDF — malware analysis report

Static analysis result for SHA-256 705da16898650e13…

MALICIOUS

PDF

40.2 KB Created: 2020-08-08 08:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9af946e3e9c3a649027fef768bfae89a SHA-1: b45e4795b662c0a21e4c9d8d231077c200282a57 SHA-256: 705da16898650e13b338efccbd182bebcb929b0181a17b9bc8bcde988e3cd8f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a redirector infrastructure known for malicious activity. The primary lure appears to be a "free download" disguised as an academic resource, leading to the malicious URL. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a high likelihood of user-initiated malicious action.

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=applied+science+mcq+pdf In PDF document text
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdfIn PDF document text
    • http://files.markcraiggallery.com/uploads/1/3/1/8/131871909/fetin-vewonid-jarijumux-pozinoxa.pdfIn PDF document text
    • http://files.centralfoodnetwork.org/uploads/1/3/1/3/131383318/bunuzozagu.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/1/0431/7220/0608/files/calendula_extrato_glicolico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/42887395180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/23725021488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/arduino_library_reference.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/88728675716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/bible_study_guide_for_genesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/4531226884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/strength_of_materials_formulas_for_civil_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/xabiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/darix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/bepiviwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/10230994632.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_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 5112 bytes
SHA-256: 4066ebc23def0ef808f0dc76d9a206236f22a3b1308b42dd08e8f659c48032e2
font_01_sfnt_off00006f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F92 10768 bytes
SHA-256: 154ec8724b8e5aa2cc5f66bd27ef5c21057de3cf142add195cdc975840711efa

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