Malicious PDF — malware analysis report

Static analysis result for SHA-256 937d63b6d47ed6d1…

MALICIOUS

PDF

46.6 KB Created: 2020-09-11 08:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 025c46fcde22b4ec51f3cdfd924a87ff SHA-1: 0f2a33de042763071683e06300b422f51cc61b39 SHA-256: 937d63b6d47ed6d13fbc90e3b6f561b064a2e7e9797f8cba6dda19897f1c9558
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. This redirector, found at https://ttraff.ru/pify?keyword=msi+afterburner+new+version, is designed to lure the user to download further malicious content. The presence of a large number of external PDF links, many pointing to potentially malicious infrastructure, further supports the malicious intent. 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=msi+afterburner+new+version In PDF document text
    • http://files.asa-dc.org/uploads/1/3/1/4/131437306/21f468be24ed0e.pdfIn PDF document text
    • http://xitiri.raveim.org/uploads/1/3/0/7/130739139/1196066.pdfIn PDF document text
    • http://files.bloomwildrose.ca/uploads/1/3/0/7/130775197/laxezese.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/1/0435/4398/6327/files/windows_10_free_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1397/1861/files/bionaire_tower_humidifier_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/kezuzesez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0420/1893/files/23325376921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/celta_assignment_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/97507827705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/3753315534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/free_picture_coordinate_graphing_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/11313216235.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 5

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_off0000797c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797C 5024 bytes
SHA-256: 099affcac186b887cc71b662607812ab620c89bd0e884b5b2303f5fc73af1d4e
font_01_sfnt_off00008acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 10136 bytes
SHA-256: 53e5bc1569949f450507f8b05afd473c994415aa7f4101e001210f00456e7168

Open this report in the interactive analyzer, or submit your own file for analysis.