Malicious PDF — malware analysis report

Static analysis result for SHA-256 87aa7835800adcb1…

MALICIOUS

PDF

37.2 KB Created: 2020-08-26 23:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb0c6c45e3e474b47805e95d5a5dc7f9 SHA-1: bb553dca9f289c5987d7c506d7cb45a0408ceb81 SHA-256: 87aa7835800adcb162e39f4bf73dbf6ef2c638e70e49a6c54079783c6d41f0c1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of numerous links, including one pointing to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

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.me/pify?keyword=queen+another+one+bites+the+dust+gui In PDF document text
    • http://bapobo.spiralingheartskidsyoga.com/uploads/1/3/0/7/130739173/vopetogorojum_roxoxik.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/1/0428/4317/7126/files/burodalizegoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/60935069302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1706/0007/files/bandos_solo_osrs_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/bosch_plena_mixer_amplifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/d_d_3rd_edition_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9572/5982/files/37003763118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/farmacos_analgesicos_opiaceos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/lion_headband_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/luxenetomelirif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/japanese_books_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/79956007866.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 1

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_off00004d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7E 5256 bytes
SHA-256: 2b1cca3388fd9ff97013c3c7a44494cb1b9d0495870b1092f131261ace3d8cb8
font_01_sfnt_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 12804 bytes
SHA-256: 64a6dafc31dbc6d71d7e251a4ab4fa93ff729a1355c6c5b556db9ef0021bd3d0

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