Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc78561e23ab4f0f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 13:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5280183d6acfa905cdfa9af4e08029c2 SHA-1: 2c8398fac294ecb165fcef225e67dbd45156423d SHA-256: bc78561e23ab4f0f9ce9886dad8aaffe782e318dc4ca38da08e795223f52bca0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Justin Bieber sorry dance video 3gp' and the redirector URL. This suggests a lure to a malicious site, potentially for phishing or malware delivery. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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=justin+bieber+sorry+dance+video+3gp In PDF document text
    • http://leripipo.bigbearvienna.com/uploads/1/3/1/1/131164250/malog_xowabususejob.pdfIn PDF document text
    • http://files.stevenjcabral.com/uploads/1/3/1/4/131406841/7273523.pdfIn PDF document text
    • http://latoxumiv.changeps.net/uploads/1/3/1/3/131380485/9357259.pdfIn PDF document text
    • http://files.universityroadhouse.com/uploads/1/3/1/6/131637953/1576177.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/1/0435/2894/5815/files/98047640241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/sanpete_county_booking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/dowejuzesilovitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/59571848995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/cinderella_story_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/investment_portfolio_template_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/health_benefits_of_chia_seeds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/67200053116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/licensed_to_drive_full_movie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00004e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E93 5664 bytes
SHA-256: cb995e38600886193fbe209a857077ee30f67d7abeb83a171a5ebc957fa9da17
font_01_sfnt_off000061e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 10612 bytes
SHA-256: ace45be9bc218da69baab7d0d31a7b25057ba42a7f2f377dd32e05644f8545fe
font_02_sfnt_off00008682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8682 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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