Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf8f860c8aa6cbb…

MALICIOUS

PDF

57.3 KB Created: 2020-08-17 05:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae5476f7613bc3f5b1e1e8711be9c52e SHA-1: 740141889c2cdb3452f512a5b254ad040ce38470 SHA-256: 8cf8f860c8aa6cbb6e83c9d63b03cef5b6a593778a0652873fe5bcf522c5b52a
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various PDF files, likely for SEO poisoning or to distribute the malicious redirector. The ML classifier strongly indicates 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=digestive+tract+histology+pdf In PDF document text
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdfIn PDF document text
    • http://sogaror.uilmusicregion11.com/uploads/1/3/0/7/130740178/4320fb5899.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/1/0431/5987/9841/files/74105315617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/76970335395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/zepijuferutivimol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/oliver_twist_1948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/minecraft_missile_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/twitter_video_ios_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/kopelebujuxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/estequiometria_agamenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/indented_key_and_bracketed_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9826/6018/files/waxoligotasilotikoridi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/85947301994.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C8 5580 bytes
SHA-256: e744ebe8c30b1e2495ba713f468e6d3f7105aeec01d5bab9f62f014e4fa5f7fa
font_01_sfnt_off0000b4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CC 10972 bytes
SHA-256: 953eed56ec64920adf89264bce2c81b95f6a6b8f420f878f8870c88bd39641ef

Open this report in the interactive analyzer, or submit your own file for analysis.