Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d63f5574f298eb3…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 01:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a65f715c2a6352fe11d8171a2da94cf1 SHA-1: 20889fec2fc866d9d6c4c3e03d5a4f1333f8d594 SHA-256: 5d63f5574f298eb3dc20b28d3c3dd947050d49d5feb4522befd124bbd80ff865
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Qualitative health research journal author guidelines' and the malicious redirector URL, suggesting a phishing or scam lure. The presence of a large number of external PDF links, many pointing to benign Shopify URLs, indicates a link farm SEO tactic to obscure the malicious redirector.

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=qualitative+health+research+journal+author+guidelines In PDF document text
    • http://files.thevillageworkshop.com/uploads/1/3/0/8/130814121/2589791.pdfIn PDF document text
    • http://files.whydohorses.com/uploads/1/3/0/7/130738531/f814f21e.pdfIn PDF document text
    • http://jagununen.christianabellydance.com/uploads/1/3/1/4/131406062/a5f1681fbd4d.pdfIn PDF document text
    • http://nalaki.jacksonchapelumc.org/uploads/1/3/2/7/132712116/daraxeladaloja.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/1/0437/6372/8545/files/breve_historia_del_africa_subsahariana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/23619327290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/xuxux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/ashoka_full_movie_sub_indo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/astm_a193_a193m.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/guniwamimexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/cobra_dsp_9200_bt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/26628307676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0283/0745/files/casio_dlp_projector_manual.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_off00006ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 5400 bytes
SHA-256: 453206a83b72c6d2e4f1ab35b0c43f0fa751241eb2b719de616a49a6dbf117c0
font_01_sfnt_off00007d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D23 10236 bytes
SHA-256: 567455e25bfeb54665e68d01265286ed4aead6297ca0161f74a00bee4cf6273e

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