Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b4928855928047…

MALICIOUS

PDF

53.1 KB Created: 2020-08-11 09:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 418eeeccb4d73a0d7eb461a4e03b90e4 SHA-1: 7efccf091f635fdfd3b3802ff3ca9bd93884db6f SHA-256: 08b4928855928047ad2deb83991475b91a9d9d6d8319390dd52803e8f1d628ab
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate educational resources, but the primary link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to game search engines for malicious distribution. The document body, though heavily obfuscated, contains the malicious URL, indicating a likely 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.ru/pify?keyword=probability+tree+diagram+gcse+pdf In PDF document text
    • http://files.rebeccafittonprojects.com/uploads/1/3/0/7/130776295/roluzagarajiro.pdfIn PDF document text
    • http://files.centrepointecincinnati.com/uploads/1/3/1/4/131406413/e08b8.pdfIn PDF document text
    • http://files.erraproject.com/uploads/1/3/0/8/130874490/4792655.pdfIn PDF document text
    • http://noxeg.thejoyoftango.com/uploads/1/3/1/4/131453329/lepapowekele.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/1/0435/2330/9727/files/astm_e8_e8m.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/nogediguwexutopow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/kirovul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/43775880294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/51556248679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/puwuxoliginegogibepude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/78970430178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/balolodimademari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/69672859417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/28_weeks_later_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0813/0197/files/fefepunazedanumujelovivij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/pluralisme_agama_di_indonesia.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_off00008731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8731 5720 bytes
SHA-256: 5a79d63a9cfc8614b14529694ae23004f0f368061a7d1358dedcaf3709ade1a0
font_01_sfnt_off00009a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8C 13780 bytes
SHA-256: f4d7adbdd6e49c409c5f77b87ec1e7f5e4181f4f61a701a2b18d9d6fb92e891c

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