Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3cf84fff2f3400…

MALICIOUS

PDF

44.8 KB Created: 2020-07-31 10:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa0406982dd6a3cf0b620a15890f2077 SHA-1: 3692ad3ff957315cfffe73ff19780c483e1c7593 SHA-256: 0f3cf84fff2f3400b9c8946f5e970dd0d8f9c3685ca7582d26812febe2861396
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector services like 'ttraff.ru'. These redirectors are designed to obscure the final destination and are often used in phishing campaigns to distribute malware or lead users to scam pages. The presence of multiple links to external PDFs, some hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation or to distribute further malicious content. 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.ru/pify?keyword=cambridge+primary+progression+test+stage+4+english+pdf In PDF document text
    • http://files.alliesandfriendsmn.org/uploads/1/3/1/3/131380279/zugivina-xisajus-mutemobovovukil-kezamom.pdfIn PDF document text
    • http://files.goodforyourecords.com/uploads/1/3/1/3/131380612/zerures.pdfIn PDF document text
    • http://files.zenergymassage.net/uploads/1/3/1/4/131407635/993432.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/1/0437/2873/2314/files/tuzopuvefuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/tuzupunosozewum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/bajulapokeruvidadep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/simuzawegalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/tuxemolirana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/pumitidesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/nupodo.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 4

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_off00006fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDF 5596 bytes
SHA-256: e26aa5435c90a184c312f4cfe52909636c0df03170b67cc530767ebd0035b8cc
font_01_sfnt_off000082c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 10376 bytes
SHA-256: 1728f161edf97f63ab411c7ec1fa9ba049e57fa97df0a36c311b23af94f5a720

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