Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37da06896a23dbc…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 16:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7505a31afea89a8d03d8640cf1a8c64f SHA-1: 5222274c4ea3e7039722b5ee9b64621ac4c789e5 SHA-256: d37da06896a23dbc7528433c1d567f886f979310045802ca01aa0c5b6fec596f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources, a common tactic for SEO link farms. One critical heuristic firing indicates a direct link to a known malicious redirector at `https://ttraff.ru/pify?keyword=que+significa+la+sigla+arpanet+en+informatica`. The document body itself contains garbled text but includes the same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=que+significa+la+sigla+arpanet+en+informatica In PDF document text
    • http://files.beardensbackacre.com/uploads/1/3/0/9/130969728/5229850.pdfIn PDF document text
    • http://files.shansbandsandmore.com/uploads/1/3/1/4/131452750/e046c94c8477.pdfIn PDF document text
    • http://xofisu.naturesjewelsak.com/uploads/1/3/0/7/130738943/xomuxep-zonijeruvodavi-tokes.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/1/0430/7078/3645/files/86131191764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/19972830529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/google_font_awesome_cheatsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/how_to_add_approved_stamp_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/27244933285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55497749658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/rijogimitirokagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/nikekew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/emotional_freedom_technique_for_dummies_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2903/7219/files/liste_des_pays_du_monde_et_leurs_capitales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1041/6793/files/12055430704.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_off00006941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 5396 bytes
SHA-256: b4605e41a30e520c14cb1ee03f667a93b34daadfe7467013cd58f40602305c9f
font_01_sfnt_off00007b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B86 10812 bytes
SHA-256: 03b3014ed7dfbe72ced067e2b61bc561659846a755a652c7a6f1199760e7c034

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