Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e5856ad611eb9c…

MALICIOUS

PDF

37.0 KB Created: 2020-08-18 21:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7567dc9a8a59a84bd6a48e56f17f95bf SHA-1: 6d8d33d7f72ec45f5b8b65c261730a4ec706994f SHA-256: 88e5856ad611eb9c7a37ca96080323042495faca9da66c675f316226a05fdd0b
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to create an SEO link farm, redirecting users to a malicious URL. The primary redirector URL is https://ttraff.ru/pify?keyword=anglo+link+english+grammar+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to the same malicious URL and appears to be a lure for English grammar PDFs. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=anglo+link+english+grammar+pdf In PDF document text
    • http://files.redbird-designs.net/uploads/1/3/2/6/132682585/bunifonudewezozige.pdfIn PDF document text
    • http://files.blackdragoninnercircle.com/uploads/1/3/0/8/130874655/9406342.pdfIn PDF document text
    • http://getolefi.lifestreamfamilywellness.com/uploads/1/3/1/4/131437709/d94cd82c7841e.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/1/0432/4684/6107/files/93745446966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/53077147366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/68022923786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/fapodosikonef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2565/2136/files/capacity_building_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/netetibagerurenif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fapodepemiretewuroraga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/nilukugewezamezakux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/sopasu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000484d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x484D 5216 bytes
SHA-256: c09337dd4df7ee21c2e581c0a4595e637591189d58b93b3805d62fdf95c15cb4
font_01_sfnt_off000059cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CC 9236 bytes
SHA-256: cb9a0d111a6efd87d69193ace615f806a8c8d03b1784d3dbe830a14132badbb8
font_02_sfnt_off00007959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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