Malicious PDF — malware analysis report

Static analysis result for SHA-256 637596ba8c509f8f…

MALICIOUS

PDF

36.1 KB Created: 2020-08-28 00:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7de5062ca7e16183910d0976dca95434 SHA-1: 604b0ae52038b781c7a3bc7dbea8295957fc9285 SHA-256: 637596ba8c509f8f5eb78dfb6fb3770166db3f8f626fec8469954d84df9645cd
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=gregg+braden+gratis, which is flagged as malicious. The document body and embedded links suggest a lure for free downloads, likely leading to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=gregg+braden+gratis In PDF document text
    • http://pivovu.gordonstounartandphotography.com/uploads/1/3/0/7/130738948/mowazeworat.pdfIn PDF document text
    • http://bizafuj.rehobothchildrenstheatre.org/uploads/1/3/2/6/132681495/jugowodubemu-vewolofoli-loduwalagox-pinawo.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/30551251375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/chainsmokers_closer_song_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/rolijajonowuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/jawaborezov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/poe_ruthless_multistrike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/mukubanikumumili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4029/3543/files/12516995618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3893/9048/files/ielts_writing_task_2_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/muparedizajikujowoxorose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/echo_show_5_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/bavuxopuxavusosapem.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_off00005094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5094 5132 bytes
SHA-256: 144499dbaf569b6471de05b9f3a4d2b657fa5f245142987392396f912b0d252a
font_01_sfnt_off0000621a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 9904 bytes
SHA-256: a1be56517993c8d371c18ad8cde73209c1bc797a5fbe5a0f35ff90cff62d6d66

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