Malicious PDF — malware analysis report

Static analysis result for SHA-256 88eac285c3c81c60…

MALICIOUS

PDF

58.0 KB Created: 2020-08-02 17:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 439e69b1388e6ad0634d9d4af07387b0 SHA-1: 5731e8a3a180e9898dc6f9c3a7188ab289bf7001 SHA-256: 88eac285c3c81c6038ff437e0a722ab083c32bc3388f2994a8698a2c2e9b0e9c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as legitimate downloads, but the primary link redirects through a known malicious infrastructure. This indicates a phishing or scam attempt to trick users into downloading further malware or visiting malicious sites. The ML classifier also 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.cc/pify?keyword=cengel+thermodynamics+7th+pdf In PDF document text
    • http://files.gregoryharpermusic.com/uploads/1/3/2/3/132302924/zitoziramekux-wixupepobobuluf.pdfIn PDF document text
    • http://files.browsbyanaaz.com/uploads/1/3/0/9/130969656/6be2de.pdfIn PDF document text
    • http://defovapuf.cycotron.com/uploads/1/3/1/3/131384401/10bde815e69620.pdfIn PDF document text
    • http://files.khrystaljcounseling.com/uploads/1/3/0/7/130740433/72a80dc2c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/nusikoxadonisosamofegitaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/nisexivalozuvuzake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/juvonujolasodufotulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/python_for_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/43451643635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/58880190391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/59756900641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/classic_wow_alliance_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/52734001708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/bazotox.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9794 5560 bytes
SHA-256: a52334afe45e8a5b2e394ab35975b3ec20cda91762d71efe8a76835733cd517e
font_01_sfnt_off0000aa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5B 10152 bytes
SHA-256: 2685be47b3aee295299ef583973d1320a2b189549f06ad74ee95965ec834617f
font_02_sfnt_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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