Malicious PDF — malware analysis report

Static analysis result for SHA-256 528e640855bcd1d0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 19:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2d7d859721085d5c578a1bda015c6dd SHA-1: 1e9cef80df4860ef4e486ad56aad4d3d0d013616 SHA-256: 528e640855bcd1d0d771293dc68c57b2ba17b6efb2cc3ca8eb706a62d6ec6c26
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, forming a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cyclotron+project+report, which is likely used to redirect users to further malicious content. The document body itself appears to be obfuscated or corrupted, but the presence of numerous links points towards a delivery mechanism for phishing or malware.

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=cyclotron+project+report In PDF document text
    • http://files.goochipoochi.net/uploads/1/3/1/1/131164076/bejorifojufeb.pdfIn PDF document text
    • http://jopizuwuw.sexladykaty.com/uploads/1/3/0/7/130738848/4970832.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/1/0438/8087/4139/files/losapunaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/jojifapokudawita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/temofesavitisusala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/61345485618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/bhagavad_gita_stephen_mitchell_free.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 2

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_off00005820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 4620 bytes
SHA-256: a594e5e74a4e0c6cae0998fbea728f4ca3cdcfce8d1b5b4d965642b40584d6e8
font_01_sfnt_off000067ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 9948 bytes
SHA-256: 0f40dc16a326b9da6f650e5fc252a37aedd19c92b6661d260369c010f8012025

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