Malicious PDF — malware analysis report

Static analysis result for SHA-256 8904fddb21893d58…

MALICIOUS

PDF

73.6 KB Created: 2020-08-07 17:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6644da277959a3baee7d73210f71411 SHA-1: a4ce91d7ea285fb0edf9ce416446d66dd762e0e2 SHA-256: 8904fddb21893d5884e3b58bd09adbcdef7b2dfa25ed38116c38bcfad481bf45
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The presence of a 'download button' lure reinforces this. Although no scripts were extracted, the embedded URLs point to a redirector service, which is a common technique for delivering malware or leading users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=liberation+theology+books+pdf In PDF document text
    • http://files.mollygazay.com/uploads/1/3/1/3/131379246/4d04b6f04.pdfIn PDF document text
    • http://files.cngwritersinkcom.com/uploads/1/3/1/3/131381555/saxidupi.pdfIn PDF document text
    • http://files.nhappyandbeautiful.store/uploads/1/3/0/7/130740249/mototoxatewa-fagekivekaxada-xufamomu.pdfIn PDF document text
    • http://files.pinkbehindthethinblueline.org/uploads/1/3/1/8/131860787/7986818.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/1/0432/2839/7727/files/comparing_fractions_decimals_and_percents_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/64617749837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/wuvikonikimidib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/dafapoduzifeliwakuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/9566675089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0319/8114/files/vilibel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/74280716886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/25858808057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/diniladimazaraxosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34597476450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8708/5222/files/body_systems_and_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/filovufojev.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BE 17224 bytes
SHA-256: eac341e4b3a172a18746409423c9ccfc1026cf87beb8058866d57034fc86af1c
font_01_sfnt_off0000cb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 5552 bytes
SHA-256: 48cb308bfa6c9e7078f95a6d62622092f8c31f611af541b11518a1d2cc5a300d
font_02_sfnt_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 10900 bytes
SHA-256: 6c01d264ffec1896046ac58cb3f64b71e96adb1b92485094b3b746b5399b5e6c
font_03_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67