Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bd8cd387466c35…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 19:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87c21029cd2f29bcce7f4ec2036c23ac SHA-1: f217d22b886fcf19181f2e78edd240441a634a72 SHA-256: 20bd8cd387466c35cad4b44df127eec4ee8ca755949488329d981bf9ffa700c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'pictures starting with letter a to z pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=pictures+starting+with+letter+a+to+z+pdf In PDF document text
    • http://kasuxorev.soulblisshealingcentre.com/uploads/1/3/1/6/131606490/a669afcd28.pdfIn PDF document text
    • http://lokekegox.pilsefestchicago.com/uploads/1/3/2/3/132302872/warimixevo.pdfIn PDF document text
    • http://bibalo.mayfieldwomensclubofwc.org/uploads/1/3/1/6/131637814/7287984.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/1/0431/5319/5162/files/7885576811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/gawakatoxogelarogaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/83757015424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/free_online_converter_to_excel_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/17161018274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/bootstrap_3_offset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/nejexew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2394/files/complete_sentences_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/19363567307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5560 bytes
SHA-256: ce241f204a01992c32b3fcbbc11460453f9f0abf15d63b440ac9c79f81dae140
font_01_sfnt_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 9936 bytes
SHA-256: 7ce2f93e880d1186badf8ac8319b35d0432f10205aa3ba6e2663bec5ba23ae54

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