Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f130f03a3db0b4…

MALICIOUS

PDF

48.7 KB Created: 2020-08-15 12:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7daafbc73630f93ae2450458df57b34b SHA-1: 0d832183ac81cc176061124dbfd37d6b4fbb0ceb SHA-256: 50f130f03a3db0b488186b464ac46d7a8cfcd2ca7feb53583ae9e13dad5579b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a primary link pointing to a known malicious redirector. The document body text, though partially corrupted, includes the phrase "Bacterial conjunctivitis treatment guidelines", suggesting a lure to entice users to click the malicious link. The presence of a link farm further indicates an attempt to distribute malicious content or SEO manipulation.

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=bacterial+conjunctivitis+treatment+guidelines In PDF document text
    • http://kobalapob.wasatchwingschapterh.org/uploads/1/3/1/3/131383309/8941797.pdfIn PDF document text
    • http://files.hooverdamnotes.com/uploads/1/3/0/7/130739146/6219677.pdfIn PDF document text
    • http://togodi.sandiegoceramiccarcoating.com/uploads/1/3/1/4/131437079/db9a710dce963.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/1/0437/8106/2813/files/91879725498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5940/4191/files/wafikotafaxexagilup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/xunowewukutasuvap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/revista_natura_ciclo_17_2020_argentina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/dukojeledoposedib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/kepaninuvibozonerosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5573/3153/files/73140112555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/jewasojaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/writing_and_evaluating_algebraic_expressions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/44322334504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/36285358371.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_off00008034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8034 5444 bytes
SHA-256: 9be5a276943ac58400afa07cbba45948b4fda679e6d7771b7245d3101335dea3
font_01_sfnt_off0000929b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929B 10252 bytes
SHA-256: e2aae47c8dc993239c028c60e58911d000a8ae14d51fc54ce9bc27169c4954a5

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