Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d5b9c72e36eaf6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-11 16:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15500694007b0b16e062b1b5bfe4a233 SHA-1: 086e2a53e61f1678bd795acd3e5a0877544eca89 SHA-256: 88d5b9c72e36eaf60dc6683bbe8628394d9f4e5be437cd9e45683a77ce27ae72
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to phish users. The document body explicitly contains a URL that leads to a redirector, which is a common tactic for distributing malware or leading users to phishing pages. 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.com/pify?keyword=pixar+storytelling+book+pdf In PDF document text
    • http://files.srtravels.co.uk/uploads/1/3/2/8/132814900/sironuzanafiw_funonagusa.pdfIn PDF document text
    • http://lejufuna.villagespin.com/uploads/1/3/1/0/131069935/315791.pdfIn PDF document text
    • http://files.bcjrlancergirlsclub.com/uploads/1/3/1/3/131384024/3863282.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/1/0431/8711/0037/files/61288298093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/puxupujofoguwedaxumelafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4743/4905/files/adverbs_of_time_place_and_manner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/496758303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8116/1111/files/50946707527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/mulegilojol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/keputuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/tipatuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/60538998211.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_off00006f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F74 5584 bytes
SHA-256: 5f9565b9f25b3fa9a93448d16ba0fc22ebbe1709b21a32f56dfbac33bd6e4dec
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 10096 bytes
SHA-256: f731c6245777bb4b3cdd03c46e502305adab8163eff74ca2e3552f227de1f4b7

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