Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8cd4ee72b25f89…

MALICIOUS

PDF

40.2 KB Created: 2020-09-10 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4402f4273ea90d0fd3169d0d3d53f329 SHA-1: be6f8d9cd70d60a6b1de8c4ad074614a522b0a0c SHA-256: 8d8cd4ee72b25f8994ce5c5595b32b312ed008c05495ecb9f121390717a73fa7
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector infrastructure or link farms. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The document body, though partially corrupted, contains text related to 'credit card authorisation form template', aligning with the SE_INVOICE_LURE heuristic. The primary attack pattern involves social engineering through a fake form lure, directing users to malicious URLs.

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.link/pify?keyword=credit+card+authorisation+form+template In PDF document text
    • http://files.octoberpvd.com/uploads/1/3/0/7/130739340/ruxuxalomakulejuzam.pdfIn PDF document text
    • http://files.ecovalleyconstruction.com/uploads/1/3/2/7/132740494/8405873.pdfIn PDF document text
    • http://files.marystrother.com/uploads/1/3/0/9/130969876/6952387.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/67641838088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/28462438893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/50195743023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/lobes_of_the_brain_and_their_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/60732655504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/refiner_s_fire_lyrics.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5bb01c_50c0cd87104e4fd7bb732bbb81f145f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/417718_8009d2db34c842d28e5e999730b19404.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/04e6f9_32725145e72449d68bcd05fa4236a12e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a052f_874c81df986b4c0883fa1b1a78efc28a.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 4

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_off00005e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5300 bytes
SHA-256: c83c30e224ac26af62659bae74e6533abb2bcc02ccd01e31184719d510bf187f
font_01_sfnt_off0000704b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 10400 bytes
SHA-256: 0d8c7699ba1787709eadc33000b5e596db6c34ce90571b08f9643ecdd38d52e8

Open this report in the interactive analyzer, or submit your own file for analysis.