Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1e81f04a8f4b63…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 12:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc8c36c08dc6197bc8cf7753ef8369a2 SHA-1: feaad187d3a9554fa8e0a21d4dce63653a3b4aba SHA-256: 8f1e81f04a8f4b636aff79ecd9bcb99a2631c648ae78aeef24312058ba02197f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=soccer+hero+apk+2018'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates 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=soccer+hero+apk+2018 In PDF document text
    • http://files.englishestateservices.com/uploads/1/3/1/3/131398244/xipamadulowukemuv.pdfIn PDF document text
    • http://files.ausportsweakly.com/uploads/1/3/1/3/131398076/sodedef-ketiz-posodovuxafikuv-zebumuko.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/1/0438/4771/2928/files/ratefukuzofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/software_design_document_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/windows_movie_maker_2020_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/graphing_inequalities_on_a_number_line_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/44150518916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/ksiki_po_angielsku_dla_dzieci_chomikuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/teks_sholawat_burdah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/11701835433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/user_story_mapping.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 3

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_off0000694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 5500 bytes
SHA-256: c085b4841c4105e2361c1061a41f34b60e42f0c7775fff3ecfb61854629dab85
font_01_sfnt_off00007bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 10768 bytes
SHA-256: 232fe61be2e50430b74bae6f6bbe592e15b363e00f862b4fc99d4ddc6a7f99e2

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