Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dfb5efc420e2c6…

MALICIOUS

PDF

39.7 KB Created: 2020-08-19 15:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e91d3bbf6ea2ce8a05232709f8df4a9d SHA-1: 3d0a441fa8a9ed1d4eb45daaf09106c4c18c9b1d SHA-256: b6dfb5efc420e2c68f3728cd193e1060e0af8d74d1614f07ed7e527bec22532b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'onboarding checklist template word' and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify, which is a common tactic for distributing malicious documents. The ML classifier also strongly flagged this PDF as malicious.

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=onboarding+checklist+template+word In PDF document text
    • http://files.pilarcaranti.com/uploads/1/3/0/8/130813639/39945f90b0c4c.pdfIn PDF document text
    • http://files.westoneheatingandair.com/uploads/1/3/1/1/131164046/59c5943e14bc54.pdfIn PDF document text
    • http://mekupeja.juabchoirs.org/uploads/1/3/1/1/131163635/8e5f8.pdfIn PDF document text
    • http://files.kathyglennstudio.com/uploads/1/3/1/3/131383860/morewamiz_faxodudetojimax_wufijija_xijajabirulenuf.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/1/0433/7926/1590/files/centro_e_periferia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/wojogalitedidarogazasole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/private_pilot_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/88665611599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/agent_vinod_full_movie_720p_worldfree4u.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/padujofevebif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/6973297054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/27798501499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/dakewizas.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 7

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_off00005cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC6 5808 bytes
SHA-256: c176a9320083d1401b60a47cfb878a8307f4ea616615d0330b9b8f05e5d52670
font_01_sfnt_off0000705e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705E 9892 bytes
SHA-256: 9194bdff0df80cce679edf60b7b936e9807781556c3506024c87c36147c05630

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