Malicious PDF — malware analysis report

Static analysis result for SHA-256 88002447f0e51439…

MALICIOUS

PDF

36.5 KB Created: 2020-08-13 03:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61ed3d3c5e12d66451b6ccf764026452 SHA-1: 0bcb4f46321e392437f3066d7c08b1452783809a SHA-256: 88002447f0e514391b52c682187df64dd877007366d4aaa337e8136774609d5e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL associated with malicious activity. The document body, though partially corrupted, contains text and URLs that suggest a lure for free PDF downloads, likely to phish for credentials or deliver further malware. The ML classifier 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/wb?keyword=zoologia%20de%20los%20invertebrados%20de%20barnes%20pdf%20gratis In PDF document text
    • http://files.mkrecord.com/uploads/1/3/0/9/130969059/rofekazu_duvirurejope.pdfIn PDF document text
    • http://dexogi.markfeiler.com/uploads/1/3/0/7/130739564/dijopefurimedix_xewefijav_zofepaxaba_vowifoxatarak.pdfIn PDF document text
    • http://files.nb-peiponyclub.com/uploads/1/3/1/1/131164358/e93562084f4d.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/1/0435/4709/9290/files/bunamusisixomuxoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/44807658003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/11213431099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/38501224093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/zofomekiguvuwusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/kaxulawuvolawananukulin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/gefupikaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/1464137952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/devorakumezelukujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/92420292240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1761/files/4_convenios_de_ginebra_y_sus_protocolos_adicionales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/84371802015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/42722123700.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 3

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_off00004eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 5368 bytes
SHA-256: e86c32a2f11136cd9acea0805362b2308cf2a6afb458f6622787735c1b01e950
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 10400 bytes
SHA-256: 340d80310fb7e3c518f8bb0075ad5840fd1924de9b3f965bb1d3c9d19280b725

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