Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7ca41607a5d99b…

MALICIOUS

PDF

56.7 KB Created: 2020-08-14 20:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b2a530c34f284607be20e98bec778ed SHA-1: cb1ca030339bd1c1f03bf4584e8aecc2908bf6d0 SHA-256: 7b7ca41607a5d99b8cd26b6e96159bbeb989a900e203032c10282ed784ed841c
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically `ttraff.ru`. The document body text and embedded links suggest a lure related to "End of school report card comments" to entice users to click. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-linked PDFs points to a link farm strategy to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=end+of+school+report+card+comments In PDF document text
    • http://files.charisvocals.com/uploads/1/3/1/1/131164100/cb4279e01.pdfIn PDF document text
    • http://kofumuf.shinermotorsales.com/uploads/1/3/2/7/132711973/49c28ac.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/1/0431/8858/4605/files/7057477500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/lixakilajenanaguge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8486/7736/files/95598018024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/fuzopepeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2185/8973/files/65322402302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/what_are_webhooks_used_for_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/45509860186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/98346666224.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000961d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x961D 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000a018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA018 5352 bytes
SHA-256: 479301d81f3502e1b78fadaf12689f5a97f8c7b7d2ce7842b5dfff748f7e5dd0
font_02_sfnt_off0000b221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB221 10420 bytes
SHA-256: c72a9171233075bb830e064e2135f13891a1f283082520e83dc9a56254eef40a

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