Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39bbf24e400612d…

MALICIOUS

PDF

32.8 KB Created: 2020-08-28 09:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae7e6aa3fb0c86c718a3a0991d931c6a SHA-1: 337c8064cda62ff3766b03fd8fc77a3583ba642f SHA-256: d39bbf24e400612db3b5f3d4620384d1ae24c8b9390b4bbef385246c2fab250f
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, with the primary link pointing to a redirector service known for malicious activity. The presence of a large link farm suggests an attempt to manipulate search engine results or lure users to malicious content. No scripts were extracted, but the structure and link analysis strongly indicate a malicious intent.

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.cc/pify?keyword=ark+dino+spawn+map In PDF document text
    • http://files.witinallshop.com/uploads/1/3/1/4/131406432/9571484.pdfIn PDF document text
    • http://wefeka.johnhamptonphoto.com/uploads/1/3/2/7/132710780/texigifenoke-vunedogakibevi-gugonepoz.pdfIn PDF document text
    • http://bapatig.kennardin.com/uploads/1/3/1/4/131453133/91d56a3f99cdc.pdfIn PDF document text
    • http://files.divinecosmicalchemy.com/uploads/1/3/1/3/131380480/bizumirakubib.pdfIn PDF document text
    • http://files.worldwidecycles.com/uploads/1/3/1/3/131378852/2199967.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/1/0433/6241/8847/files/eldritch_knight_5e_spells_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/56249686374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/go_math_assessment_guide_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5349/0074/files/abiotic_synthesis_of_organic_monomers_and_polymers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/raxatag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4988/2524/files/autocad_2007_free_student_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/programming_concepts_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/bagunipumom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/zubina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/34384427791.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_off00004554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4554 5220 bytes
SHA-256: 1907092a72e71a8a32bdc2fbc3d93bf0a5cc9ae8740e429a75ac6e7799472f92
font_01_sfnt_off00005711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5711 9244 bytes
SHA-256: d1e8545019c3649820abc5ed2110e4f04754bf174081edfb0a8603642ecfd8ee

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