Malicious PDF — malware analysis report

Static analysis result for SHA-256 a923203b53fdf3a2…

MALICIOUS

PDF

35.1 KB Created: 2020-08-18 22:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d518109de90009dbf0c32132c56308d8 SHA-1: f23f37d7b3eaa8ba90c7c8a9b346ee5637256f85 SHA-256: a923203b53fdf3a268bbc5a9f495409c490a545cda9a75e79e048b362bc2e175
202 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment

The PDF file contains a critical heuristic indicating it links to a known malicious redirector, specifically `https://ttraff.ru/pify?keyword=bleach+vs+naruto+apk+3.+3`. This URL is presented within the document body, disguised as a download link for an application. The file also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to `cdn.shopify.com`. The presence of a visual download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bleach+vs+naruto+apk+3.+3 In PDF document text
    • http://files.innovativetruth.org/uploads/1/3/1/8/131871705/6504779.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/1/0429/6241/9863/files/python_combinations_without_itertools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0151/0045/files/dafuporewageza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/wazafinuviwunad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/html_page_to_jquery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/clear_variables_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/safety_award_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/jquery_validation_bootstrap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/picsart_app_for_pc_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/ansys_workbench_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/arabic_proficiency_test.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3D 5388 bytes
SHA-256: 834eb69e665afe194205d9c3e4ab80712fac4a78f2d43080c961d9c724a01546
font_01_sfnt_off00005e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 9868 bytes
SHA-256: 10053ae6fdff2fad30fc7d6e53330cb8d945725a87733af63181c3da219a7b1d

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