Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae636bf433373ef1…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 11:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa98bae5d19b21fcbd66a105e6d335b6 SHA-1: 45faa9279e87eb19edbb019b538c0f700cf45cee SHA-256: ae636bf433373ef1baa77dfc82f0a1906348bb5071919d56e7d43ddaabe81f6f
234 Risk Score

Malware Insights

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

This PDF document employs a common lure technique, presenting itself as a download for 'KGB archiver for windows' and linking to a redirector. The document body contains multiple URLs, including the primary redirector https://ttraff.ru/pify?keyword=kgb+archiver+for+windows, which is designed to obscure the ultimate destination. The presence of a password-protected archive lure suggests the document is intended to bypass initial security scans by encrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=kgb+archiver+for+windows In PDF document text
    • http://files.kalaitzakisdesigns.com.au/uploads/1/3/1/0/131070098/xafokalofote.pdfIn PDF document text
    • http://files.antiquesg.com/uploads/1/3/2/7/132740424/bf8e42ff1d.pdfIn PDF document text
    • http://xalat.kateholland.com.au/uploads/1/3/1/6/131606339/c45c53d47f.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/1/0431/7370/7925/files/xolizukisajivesamuzibat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/speedy_current_affairs_august_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/tenidopukapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/tewekesabezinexeginuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1050/5379/files/picsart_hack_apk_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/boom_beach_apk_mod_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/the_canon_s_yeoman_s_tale.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_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5512 bytes
SHA-256: 252fa33516265e568fe8dbb66f8865c51979f94f331258fd50bab58e1add3f42
font_01_sfnt_off0000746a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746A 10776 bytes
SHA-256: ee7c66d5fc0cc6f016e83d13bfd9dd90daf5d760c23faf9e345ff18326428227

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