Malicious PDF — malware analysis report

Static analysis result for SHA-256 d907861daace7795…

MALICIOUS

PDF

46.5 KB Created: 2020-08-25 04:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 599c0093e86d6d295dc57da5a5ef827f SHA-1: f0d3c19b284ac01c1e165c696ea9b4002824c538 SHA-256: d907861daace7795f3e8aff40699d34c26d7bc5fbcdb0f7a208573b238aaeeb2
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=capitulo+2a-+8+repaso+crossword+answers. No scripts were extracted, and the document body is largely unreadable binary data.

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=capitulo+2a-+8+repaso+crossword+answers In PDF document text
    • http://files.alexblassingame.com/uploads/1/3/1/4/131482968/wijadagexe-wotiribi.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/1/0434/6737/4758/files/biosecurity_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/86017601235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/materi_aterosklerosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/91373754392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/xobedojadeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/tebolofudovigipuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/osrs_prayer_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7864/7713/files/culture_media_for_food_microbiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/play_store_apk_android_4._4._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1050/5373/files/niriganopizuguz.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_off00007541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7541 5424 bytes
SHA-256: b9320d9559935f4e239a33cd776d3e6238f82bf28a8e8cb0492d20c98a4ff5e3
font_01_sfnt_off000087d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 11116 bytes
SHA-256: 1c1b613e95d7e657772819ab411ad26a8e69d26788a0efddb5df9d68f6ead7c1

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