Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab987938a1bcf03c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-09 15:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b9ef50a71dca933273788d398569c62 SHA-1: a185f2b3efd0bb6d8eaa9c6158719b61f5e17f81 SHA-256: ab987938a1bcf03cac8a89299e04539e7db62bdb983784dab97e3b7d8ea92610
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'blood supply of the heart pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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.com/pify?keyword=blood+supply+of+the+heart+pdf In PDF document text
    • http://juramorib.awl-ncc.com/uploads/1/3/1/0/131070993/b4b6080c.pdfIn PDF document text
    • http://files.ktkayakrentals.com/uploads/1/3/0/8/130813855/e25a2f28b7.pdfIn PDF document text
    • http://files.cobh.coralleisure.ie/uploads/1/3/0/9/130969999/vaduzabemofas.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/1/0433/1008/8360/files/27427221735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/24555420548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/sajixebodobubosot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/conway_s_game_of_life_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3700/7778/files/2208123655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/jobavifawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/rabigidoguka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7310/9152/files/im_blue_remix.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 5

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_off0000791e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 5280 bytes
SHA-256: 94d21d4b503eb85a01a35635e3682713467c09f5f5b11ef76421449e35b7d718
font_01_sfnt_off00008b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 10408 bytes
SHA-256: 91a8e80422c14e0fa4a1f8ba02bb3982b35437eef11ea214538df0648724df5a

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