Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d79c855d2a6f96…

MALICIOUS

PDF

45.6 KB Created: 2020-08-11 06:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6cfd891f1c4a58e32b3051c75cc8df0 SHA-1: c5137469043f411380d313005cc021684c66c709 SHA-256: 19d79c855d2a6f96210aff2de728f4e010c917bd7d8a810ad0bf7b252ee8d4ac
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same search query as the malicious URL, suggesting a lure. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=advanced+life+support+erc+guidelines+2020+pdf In PDF document text
    • http://gugosuku.garageworksphotography.com/uploads/1/3/1/6/131606183/vumovowopaxusilixeje.pdfIn PDF document text
    • http://files.devotionfarms.com/uploads/1/3/0/9/130969505/fedokafowegu.pdfIn PDF document text
    • http://files.blacksheepswimwear.com/uploads/1/3/2/3/132303019/02e3101d1b.pdfIn PDF document text
    • http://files.janeelizabethstudio.com/uploads/1/3/1/3/131397981/8358516.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/1/0431/7737/7946/files/al_quran_kareem_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/human_body_anatomy_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/want_to_edit_file_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/4_color_personality_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/22064230276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/92084546104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/vobelojitewelaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/fusubusudibux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/smiley_face_copy_and_paste.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/fatelajanuwin.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_off00007286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 5648 bytes
SHA-256: 692ed911747389ddf8bdb710b3b2d29f5335ec43438788d962017e77149126f0
font_01_sfnt_off000085d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D6 10420 bytes
SHA-256: 9b2c382069bfba3c7f0125e30dd14865d4fe5ff140ef8450dae43d98aa52b7e2

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