Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f787b65de738db2…

MALICIOUS

PDF

64.6 KB Created: 2020-08-19 10:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d59cd37ee367de402c0c7a750230a82b SHA-1: 0e8e5c0defde539b595efa7a7f9b5575d81970e0 SHA-256: 7f787b65de738db2b2649197812d14f9de2acfe2ec3fafdc07114e5cf0572984
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL identified is https://ttraff.ru/pify?keyword=representation+theory+book+pdf, which is flagged as malicious. The document body appears to be malformed or obfuscated, but the presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or malware distribution.

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=representation+theory+book+pdf In PDF document text
    • http://files.smilesensations.ca/uploads/1/3/1/4/131406950/747358.pdfIn PDF document text
    • http://xinov.thepelham.net/uploads/1/3/0/9/130969060/xusexosinip.pdfIn PDF document text
    • http://files.scituateriltcc.org/uploads/1/3/0/8/130814121/vivegepaxe.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/1/0430/6350/9143/files/whatsapp_business_app_for_laptop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2683/0744/files/77136812250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/program_to_edit_documents_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/lagemaxovumav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/schindler_s_list_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7750/1079/files/81817003546.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 2

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
stream_003_off000062f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x62F1 30296 bytes
SHA-256: 24638ca2437d417fd014d4820f532e8a6b10b71dc26819e970e21bd546673c28
font_01_sfnt_off0000c069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC069 5412 bytes
SHA-256: 52240e7c7c06a13693d4426153b97ad6148e235f473c10af2d8eb0e1cac4ed0f
font_02_sfnt_off0000d2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CB 10236 bytes
SHA-256: c4c3834a531a262f9da5bcaa199c020e659179ab50e39ebc1818f61fa5e061b3

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