Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b2568c08cfaa4a…

MALICIOUS

PDF

57.4 KB Created: 2020-08-11 15:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2ddfe7ebd95cc9b4619af26d143f6e2 SHA-1: 2f344a4a6784e18acd4a9b83edbc9be67c7aadd8 SHA-256: 73b2568c08cfaa4a3f634fad9d739814274aec928ce4fda556cbd65b4108eeea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, disguised as legitimate documents, which is characteristic of SEO link farm abuse for phishing or malware distribution. The primary redirector URL, https://ttraff.ru/pify?keyword=basic+cost+accounting+concepts+pdf, is flagged as malicious, indicating a likely attempt to lead users to harmful content. 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.ru/pify?keyword=basic+cost+accounting+concepts+pdf In PDF document text
    • http://files.lyndziecherry.co/uploads/1/3/1/4/131407968/8896782.pdfIn PDF document text
    • http://bukirovol.drmarkbloom.com/uploads/1/3/0/9/130969162/biramefuxe.pdfIn PDF document text
    • http://files.lussoproperties.net/uploads/1/3/1/1/131164081/pojewel.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/1/0428/4622/4551/files/67033838319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/nyc_rent_stabilized_lease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8982/0838/files/safe_mode_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/sobitapebafosetumap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/introductory_chemistry_zumdahl_decoste_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/pofavuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/55330303252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0193/7063/files/rofesitivovifigasaxagupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/gezopixaxofuxaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/13186230444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/80038788399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/admission_form_format_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/puvepiruzutazow.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_off0000a237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA237 5244 bytes
SHA-256: 263185822e245ab33ef5b44bed8eb526a1b24ea1c7e0b3c4d636ba983f64671e
font_01_sfnt_off0000b41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41D 10604 bytes
SHA-256: 3b8ced330723e0c92bdcbe445e4a37b9e22fae85f4734443406a0b7c269ba4e3

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