Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d0269583d44626…

MALICIOUS

PDF

38.5 KB Created: 2020-08-17 01:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d07efb066072535ea01b92f1b2a8fec8 SHA-1: 8f1fc0dc2355bf1ef6e8642c8999d4de9e281113 SHA-256: 85d0269583d446268547212199709b918f3fd1a809389d69c6b8ca231e77d00d
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a "chemistry of materials word template" keyword. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation, likely to obscure the malicious redirector. The ML classifier strongly indicates malicious intent.

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=chemistry+of+materials+word+template In PDF document text
    • http://files.uscmtr.com/uploads/1/3/1/6/131636644/4193670.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/1/0428/0093/9164/files/21731274701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/pomopiruduzuvexop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/susatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/48818720115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/temujebezalorifuvotisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/zefilawijarisetavefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/92225508491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/wuxunebosodimusaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/tivofokinaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/giladigugipuwiwonesovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/74837486975.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 3

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_off000058f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F6 5380 bytes
SHA-256: 061bc89c9ec116b3fd3b272c9c3acf281049de127f369b4a1cd7aee53bc600f9
font_01_sfnt_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 10056 bytes
SHA-256: 34dcb690f3df1867c87fa0c8a80c27f0b10f38af4c9a10f032cdbc4b1a9d1811

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