Malicious PDF — malware analysis report

Static analysis result for SHA-256 5927e41ab74cdbbb…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 14:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 55f597a6b0569f6fc0af443697dfb3ff SHA-1: 046cd078cc268de713265c973d34710ab588e5d6 SHA-256: 5927e41ab74cdbbb1b13ba90967913c2135365867fb3a5fb5c308db9fe1697a4
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links designed to redirect users to a malicious redirector service, identified as 'ttraff.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to manipulate search engine results or distribute malware. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=guidelines+of+sebi+for+primary+market In PDF document text
    • http://gebava.earltoddbbq.com/uploads/1/3/0/7/130739415/pujogozulijova_godegajateka_dimewika_tajidofafe.pdfIn PDF document text
    • http://furagi.jennifercass.com/uploads/1/3/1/8/131857419/zavipajuwemip.pdfIn PDF document text
    • http://files.georgiarugbyunion.org/uploads/1/3/1/3/131381772/kufoji.pdfIn PDF document text
    • http://files.jumaephotostudio.com/uploads/1/3/1/4/131437311/bixogaxix-bilip-sutarezup.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/1/0433/0687/7080/files/dewefezagabujam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/gisaworazewabufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/23076051502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/43118594900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/united_airlines_gate_information_sfo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/37658142889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/sibezubivogunozojodupafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/dideguxuporivosiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6705/files/79915870077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/76412406541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/wasteland_survival_guide_fallout_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/pelip.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 5524 bytes
SHA-256: 4ff5b09de9492dfb4836fb0e73f627f775f8c424572879ac4651ab97bc208105
font_01_sfnt_off000073e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E0 10168 bytes
SHA-256: 91bd19e2161247f57b522416b458a966039892e884715b8adeeb77bd5c75a26d