Malicious PDF — malware analysis report

Static analysis result for SHA-256 87685b4a14bde630…

MALICIOUS

PDF

47.0 KB Created: 2020-08-24 07:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87ee703ae275427511ae033d2da0acc3 SHA-1: 89643cb4e64bd3d2101ff81e6ff15e149485d86b SHA-256: 87685b4a14bde63093de0037f926283984d3520b3cef45f655354f0887e546f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic and potentially distribute malware or lead to phishing pages. The ML classifier also strongly indicated 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=absceso+periodontal+tratamiento+pdf In PDF document text
    • http://mobox.wlcbands.com/uploads/1/3/1/4/131438641/vuxejuzu.pdfIn PDF document text
    • http://begago.eespip.eu/uploads/1/3/0/7/130775934/274540.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/1/0429/5013/1878/files/70122708451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/64147670692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/60352371624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/57608714443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/vyapari_mitra_gst_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0841/8211/files/oceanography_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/kujenesitonegusawojewup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/48918396306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4979/3174/files/product_key_for_delta_force.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1278/7109/files/case_study_operations_research.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_off00007597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 5432 bytes
SHA-256: 8fbad2c07b99b28c635ec73bc71e1ee2d3772b2bfc3abd3011c912e924f8b6a4
font_01_sfnt_off000087e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 11676 bytes
SHA-256: 36f32286d612c0bc1e973c659bbff340aec2eb75e9f108c2dcd756923b23f550

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