Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84a39ee8b6a4363…

MALICIOUS

PDF

51.0 KB Created: 2020-08-04 04:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7b4f34a430c5a9be281c10c06a8f0c6 SHA-1: 21b7ae08b7deb6fedb1bfc0329996a2aa3cef77e SHA-256: e84a39ee8b6a4363da35e1b70c2a19fece01b891ce8f20d9684ab28dc50f1711
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with the primary redirector pointing to a known malicious URL. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest a lure to academic or informational content, which is a common tactic for phishing or malware delivery.

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=understanding+computers+today+and+tomorrow+chapter+5+pdf In PDF document text
    • http://files.aliciaallenphotography.com/uploads/1/3/1/4/131437669/kalinurefu.pdfIn PDF document text
    • http://files.goldfishprints.net/uploads/1/3/0/7/130775846/mevakejozimew-malidaguvefudas-vafobuke-dalufekuw.pdfIn PDF document text
    • http://files.danettemariealbino.com/uploads/1/3/2/7/132712209/7259567.pdfIn PDF document text
    • http://maxolut.wolsinghamwayfarers.co.uk/uploads/1/3/1/4/131452821/vukafisineg.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/1/0433/0638/5558/files/81495180464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/35264684098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/63682373156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/nidaxulisutijinigurumodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/kigixemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/sozukovobogosidewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/pegozijukeworifopere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/dilinimokodezupux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/verizon_dns_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/the_outer_limits_season_2_episode_17.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/wezetokaduzizowiran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/biblia_paralela_ingles_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/xagonap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/41686504043.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_off00007dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 5844 bytes
SHA-256: 1d9d54e750a269fcad985a1f8da9db6f50050961dc5835362faef5eea9e1f9a6
font_01_sfnt_off000091a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A0 13988 bytes
SHA-256: ecdc94c17ba632439f3ee7541c1f9c4f68e0b2202e69996a0e0163d51d8fbab0

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