Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf7af8677b5c61d…

MALICIOUS

PDF

48.7 KB Created: 2020-08-10 00:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53ff39453ed6b47b7ae2b35312a20058 SHA-1: 5205ecd6c2e243e48d7e2c68b8643fb704b3f4f7 SHA-256: 3bf7af8677b5c61d0ea12edb3d31870e1302e4ae8ad32308861fac10e881049c
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL is https://ttraff.ru/pify?keyword=advanced+trainer+pdf+2020. This indicates the document is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated.

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+trainer+pdf+2020 In PDF document text
    • http://files.misslncreations.com/uploads/1/3/1/3/131381428/gafago-wirikufubod-mojediseleva.pdfIn PDF document text
    • http://files.8book.org/uploads/1/3/0/8/130873927/6fe99e743f9f8.pdfIn PDF document text
    • http://files.littletonpreschool.com/uploads/1/3/0/7/130739826/boxafabenupe-vageziril-vofafunufob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0460/5094/files/brentuximab_vedotin_fda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/zawevazowifawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/tisowatuxomikep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/dolenoronakotisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/ubuntu_server_18._04_static_ip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6510/4791/files/xorawanegoxosima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6776/7970/files/sugirosaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/22354743997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/nunirutobononebagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/luwivulosofanoginanuniwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/minor_arcana_meanings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/41258159791.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 4940 bytes
SHA-256: 2a439a6387007d91f42036e9a157faf2ab7603eb318dab860f54430d1ef04687
font_01_sfnt_off00008482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8482 10388 bytes
SHA-256: e17f8be12a5ae4cb50b9afa8b38bb0888f99b715e8c49fd4d553b6ba9020a06d
font_02_sfnt_off0000a7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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