Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f22b745a8914bb6…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 06:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4114e278fb8b12ca6b2ec5f97eaa95d SHA-1: b4eccb3ebf2f1c485c3ef32bf5bd0259b3e6194b SHA-256: 5f22b745a8914bb6a1c354b904bb85959440e480377f56f414f90bca6f671015
194 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service (ttraff.ru) disguised as a document about covalent bonds, indicating a phishing or scam attempt. The heuristic PDF_SEO_LINK_FARM suggests this is part of a larger link farm operation. While no scripts were explicitly extracted, the ML classifier and redirector links strongly indicate malicious intent, likely to lead users to further malicious content.

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=coordinate+covalent+bond+examples+pdf In PDF document text
    • http://files.esainhospitality.com/uploads/1/3/0/7/130775607/gedawuw.pdfIn PDF document text
    • http://files.usfncnw.org/uploads/1/3/1/6/131637953/9901056.pdfIn PDF document text
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.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/1/0431/9671/1069/files/45966317716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/1915871414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/zimomanuditavuvunifaxanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/zixemakomudakegove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/zofufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/tukakogugiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/wamutunumilixajogetuwola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/67089959679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/16390701164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/dimosagapekajujexomipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.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_off000076ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 5380 bytes
SHA-256: 932f393e271fcae877ff33b7710742e2243866c7bcbc27d6d7be9218eb2d5321
font_01_sfnt_off00008923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8923 10208 bytes
SHA-256: da09aaaa4fba790e95c0edd43df7da483403b1e65087b778186df409e6fe32b7

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