Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d48855b8e7f0c08…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 06:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1f028a15e42367d841a26c195d9df94 SHA-1: 9a939f3fe71dd67b85d830991a2cc54a587b43a0 SHA-256: 3d48855b8e7f0c0811905d515f93b2356dfb98c85a622852b553f94d80b98b4a
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a lure for a highly compressed Android emulator, directing users to a malicious redirector URL. This is a common social-engineering tactic to trick users into downloading malicious software or providing credentials. The ML classifier strongly indicated maliciousness, and the presence of a redirector link further supports this. No scripts were extracted, but the overall pattern suggests a downloader or phishing attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=emulator+android+for+pc+highly+compressed In PDF document text
    • http://files.chennaishiayouth.com/uploads/1/3/2/7/132741352/16a15.pdfIn PDF document text
    • http://files.wolffwords.com/uploads/1/3/1/3/131379815/3b897894c9f7d9.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/1/0428/9950/5311/files/54182238079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/hallelujah_trumpet_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/illustrated_course_guide_microsoft_excel_2020_advanced.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/antimicrobial_activity_thesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/62357467707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/tewopikafotuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/61361642075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/thunder_egg_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/cnn_female_sports_reporters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/notting_hill_carnival_map.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_off00006d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 5628 bytes
SHA-256: 6e1403e04a3599f743cc77868e97693e7d71391a5a84ece86b248b5a86dc294f
font_01_sfnt_off00008035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8035 10196 bytes
SHA-256: 48f36dd09f9255d030373d457f68ec05802388a063b0d554f0281bdca5814052

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