Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf9fe44f7a7878a…

MALICIOUS

PDF

49.9 KB Created: 2020-08-24 09:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ee6d5e9dce84009d4b731b15ad33b38 SHA-1: 2eac7a4d4162c5ab7e572d80d4a8b08ae33f8f73 SHA-256: 6bf9fe44f7a7878a345938ac251bc2502e365b1806b5c498ddb0880997ae5b56
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body also contains the same redirector URL, suggesting an attempt to trick users into downloading potentially harmful content by offering free manuals. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=remington+chainsaw+manuals In PDF document text
    • http://lubijawan.innerframework.org/uploads/1/3/0/7/130776474/c33aa.pdfIn PDF document text
    • http://files.constantcovering.com/uploads/1/3/1/4/131414516/ritarumusiset_faroni.pdfIn PDF document text
    • http://files.cghcollectibles.com/uploads/1/3/0/9/130969352/fovipawasusasusis.pdfIn PDF document text
    • http://dapud.yogadown.ca/uploads/1/3/1/3/131398024/nuwafularupokosewalu.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/1/0428/1165/4307/files/nawebumovusewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/vubat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/69004433733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/robert_bringhurst_elements_of_typographic_style.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/mulazokuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/legokuxemalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/fufuposobisefalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1295/9905/files/jexokewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/14493199840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/52981928691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/xizinimexutokokexol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/autocad_commands_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4460/8920/files/konuzerepukapiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.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_off000085ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 5216 bytes
SHA-256: d42800b77b9e43264b34dc228ee8cbe8e7e1eaac83c9865823239c48762ae371
font_01_sfnt_off0000975e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975E 10436 bytes
SHA-256: 5f54e988b1e027414743b4f2a3a6ccf7530c8f1f91b83203f5517e6f4f2f6f03

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