Malicious PDF — malware analysis report

Static analysis result for SHA-256 c240c09923436181…

MALICIOUS

PDF

51.8 KB Created: 2020-08-19 10:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 552cc34ebebca7c9e8fe2388b957b9e2 SHA-1: 134b2baeddb0412879589c72be6f4459310baef5 SHA-256: c240c09923436181f28b8efb5741ef15720996e5d3ea69f5641cfb4e26a6e051
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/pify?keyword=popcorn+piano+sheet+music+easy. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'popcorn piano sheet music'. No scripts were extracted, and the PDF structure itself is the delivery mechanism.

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=popcorn+piano+sheet+music+easy In PDF document text
    • http://files.westcentralcamp.com/uploads/1/3/2/8/132815342/7229466.pdfIn PDF document text
    • http://files.bulacanliving.com/uploads/1/3/0/7/130775137/sazoze_fukipebajif.pdfIn PDF document text
    • http://kuzusig.nickamatangelo.com/uploads/1/3/2/6/132682883/1323590.pdfIn PDF document text
    • http://dutokoge.houstonartsociety.com/uploads/1/3/0/7/130776167/vupirufikadodenedok.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/1/0434/3159/2102/files/becoming_the_archetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/buderus_gb172_t50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/insurgent_full_movie_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/92028297469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/kaxigagokusinijomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/sonapuximis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/govizukitabinaw.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 6

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_off00007a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A58 4540 bytes
SHA-256: 1c45ae965081101187260ee0301d40b4e3d12d29f5343a822c4eee2c9ac0513e
font_01_sfnt_off00008a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 5244 bytes
SHA-256: 8e55602ea71ac2647d76d8e39e2d756ee3c88fb05ad0820067113d1be22f775b
font_02_sfnt_off00009bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 11512 bytes
SHA-256: 24cf79a2d0fd4eedb96a66dfea82e94739faae7f81b7e0ac74717ad1741cbda0

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