Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1871542b4eb09d7…

MALICIOUS

PDF

61.9 KB Created: 2020-08-10 04:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8fa97c8c316550b464043e1c90000ba SHA-1: 555531ffa8b82f5817a0649b625b83986b598f06 SHA-256: e1871542b4eb09d79e5e582857ef728acee821999462a78541805b4eaced97dc
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=quotations+from+chairman+mao+tse+tung+pdf+download', is designed to trick users into downloading further malicious content. The PDF also contains a link farm heuristic, indicating a large number of external links, some of which point to potentially malicious domains. The ML classifier also strongly flagged this PDF as malicious.

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=quotations+from+chairman+mao+tse+tung+pdf+download In PDF document text
    • http://gafozoxi.luebtowj.com/uploads/1/3/1/4/131438641/d8e50d69b98096a.pdfIn PDF document text
    • http://files.prolyticsconsulting.com/uploads/1/3/1/1/131163687/8629519.pdfIn PDF document text
    • http://files.comfortexperts.net/uploads/1/3/2/6/132682802/povabug-lorumos-koxasodosoduri.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/1/0431/3802/3592/files/periodontal_disease_diagnosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/61587599973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/jisoguvasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/sunglasses_emoji_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/essential_words_for_the_ielts_with_downloadable_audio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/70685624887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/niwetopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/91403893782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/pozilelobuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/12385351601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/bokifi.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 4

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_off00008ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC1 12032 bytes
SHA-256: 9a584da15e7e116e6456d78a2402a4012b4308024aa6dc8d9f5d6a23ac8da5a2
font_01_sfnt_off0000b1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FB 5724 bytes
SHA-256: bcfe54e5b9f1e61d0b75cdf2c909200e336581eca7e1c11afd5a9ee5db77a9ee
font_02_sfnt_off0000c564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC564 11052 bytes
SHA-256: 6b0aad742774d6c9baa1e6e61fa0eda8acdfd86c422d0c105214da0fdb7c0ae3

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