Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0c38cfa6b570ef…

MALICIOUS

PDF

41.1 KB Created: 2020-07-27 17:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7562fd23266b55ef59dca430da8239f4 SHA-1: 3f94b439fab404925cdf4eac93bb7b3148483057 SHA-256: bf0c38cfa6b570ef5039b01f6eb970c84104febd1c6b1d687ce15bad068221e5
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of embedded links and the redirector indicate an attempt to lead the user to malicious content, likely for further exploitation or credential harvesting.

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.com/pify?keyword=blends+and+digraphs+worksheets+2nd+grade In PDF document text
    • http://files.chesapeakemobile.com/uploads/1/3/1/0/131071056/zutudagup.pdfIn PDF document text
    • http://files.cheekyupstart.co.nz/uploads/1/3/1/3/131378771/gafun-xudemijofin-sukibi.pdfIn PDF document text
    • http://files.redwoodvisualarts.org/uploads/1/3/1/8/131856430/voladoveviz-tokoxeji.pdfIn PDF document text
    • http://files.barehandscrossfit.com/uploads/1/3/1/3/131398091/9381698.pdfIn PDF document text
    • http://files.wefightforfood.com/uploads/1/3/0/7/130776536/37a25b55656aa7.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/1/0438/5823/1461/files/mesose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/51681675735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/vizuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/begipiwite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/13352720754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/mutolujipixur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/4257479328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/96695868056.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 8

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_off000062d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 5344 bytes
SHA-256: 101872011f22bc5854e2b80700803b8b5094428a0fc2c0b0354fc05fadf8091f
font_01_sfnt_off0000750b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750B 10008 bytes
SHA-256: 5d51a75ffa41efe04892546c9df15778a4266bbefab03c4986950d9004541bd8

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