Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5892506c0235d9…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 06:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae55ef5e1214ac5a0452398a9d6bac62 SHA-1: 804a3bd4376772f1989ecfd9bc8d8244ccb2c0b7 SHA-256: 8c5892506c0235d9b08a8f48fdf7e6418a7f1b7d14d6901fb126cc9042db8482
194 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as an academic document, specifically a 'Marksheet of class 10 bseb 2019'. The primary malicious URL, https://ttraff.ru/pify?keyword=marksheet+of+class+10+bseb+2019, is flagged as a known malicious redirector. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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=marksheet+of+class+10+bseb+2019 In PDF document text
    • http://files.thestoryexploratory.com/uploads/1/3/1/6/131637640/c52f4.pdfIn PDF document text
    • http://files.thebarefootmomma.com/uploads/1/3/2/6/132696128/468b82da8f041c.pdfIn PDF document text
    • http://files.scarlettcrawford.com/uploads/1/3/1/0/131071258/bokajudaz.pdfIn PDF document text
    • http://kalirewek.prospectorpark.com/uploads/1/3/0/8/130874493/4903526.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/1/0433/0687/7080/files/mufowotipopugisafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/57111013601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/34792998917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/35335089008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/43349206091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/wurafuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/vozevaneban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/bsci_code_of_conduct_bangla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/71292981891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/casebook_on_contract_law_jill_poole_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/24510830091.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 6

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_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 5660 bytes
SHA-256: c91e073fcf564340c4f73465897b8c7b73b683e901b26d630105fe5990ee7fef
font_01_sfnt_off0000748d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748D 10308 bytes
SHA-256: 92d354562cf18d77c5b8fa80efe6fb7ccea064dd86e0f6ef0cb54179ea4bd48a

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