Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbd6ca61c55bada…

MALICIOUS

PDF

43.1 KB Created: 2020-08-09 06:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d68ca94fa2ce81278c874d40b72af687 SHA-1: bebdbc9b4a1daa592b9ae91def60a8b3905b5a8b SHA-256: 6fbd6ca61c55bada42067e9a03ec7b28c1cd7493b8e8b13a37d040b44382c6ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious content under the guise of a free download. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the primary redirector URL.

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=buerger+disease+adalah+pdf In PDF document text
    • http://files.janesmithacu.co.uk/uploads/1/3/0/7/130775953/8d39c29d879.pdfIn PDF document text
    • http://files.valetridents.com/uploads/1/3/0/8/130874679/jowezedulopomasupif.pdfIn PDF document text
    • http://files.otvoroci.com/uploads/1/3/0/9/130969847/refoxurif-tasukizo-likisilusazumeg-pixiroxo.pdfIn PDF document text
    • http://wufaw.talltaleswithpoppynwosu.com/uploads/1/3/1/4/131453177/fumapa-rezojavopugi.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/1/0430/3162/5882/files/zonevatisaxababoxav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/99565535272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/73549035635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/skyrim_se_crash_fixes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/86046159200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/5470884225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3082/2555/files/sumexapogexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/activate_office_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/54292514443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/84772158430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/89117786042.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_off0000693a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 5352 bytes
SHA-256: 9cdf07735b255fa3cdd263459fbc135ec02e7cf4f11b1514301ff6c0e0af0407
font_01_sfnt_off00007b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 10856 bytes
SHA-256: 45066fb8eb7b72a8c62c69d759baf5a809460da885cb560e959f7bc88286faf1

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