Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bf336a14b4358d…

MALICIOUS

PDF

54.3 KB Created: 2020-08-27 20:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ace0a7c4ffd0e60d75d5c7366b59c27 SHA-1: a2e7f0ce4eb87b2a43091cef2f53fdf1e328bfc4 SHA-256: 55bf336a14b4358df9bd9c15621f93cbb074ef50914b5783517c544e2212b6d1
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=rubik+s+cube+pll', points to a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links hosted on Shopify domains indicates an attempt to obscure the malicious destination and potentially leverage legitimate infrastructure.

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.cc/pify?keyword=rubik+s+cube+pll In PDF document text
    • http://files.leafingthroughbooksandtea.com/uploads/1/3/2/6/132681713/338398.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/1/0433/7955/6504/files/cumulative_probability_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/dark_souls_3_farron_keep_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2529/9606/files/40265886467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3098/5376/files/55828898076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/3553814931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/lerewametuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/bahubali_dj_songs_telugu_videos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/sandvik_coromant_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4954/8966/files/pujavuveretilajokiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/sorboto_mongolo_radhe_binodini_rai_ringtone.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
🗂 Part of campaign: leafingthroughbooksandtea.com 3 samples

Related samples 5

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_off00008b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1B 4832 bytes
SHA-256: bc6bb8b3148cdf2b15c76a1f153cbca7d6eff069e56414eba0c53d502327e3f1
font_01_sfnt_off00009b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9E 15320 bytes
SHA-256: 4b6626dc14507af166d550bf1d647b24517f96d9fda16bfacca7f05998b56347

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