Malicious PDF — malware analysis report

Static analysis result for SHA-256 76caf45f0a0fe4cf…

MALICIOUS

PDF

51.2 KB Created: 2020-08-28 06:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b757ab0502a1b05a9793ec968be503af SHA-1: 9050833b34d1a8e383b902a2267134631a14d2e8 SHA-256: 76caf45f0a0fe4cf257c73885ef757d96a628da13146488a6431346266398527
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/pify?keyword=spongebob+scaredy+pants+full+episode', is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting an attempt to trick users into clicking through to malicious content. The ML classifier also strongly indicated maliciousness.

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=spongebob+scaredy+pants+full+episode In PDF document text
    • http://furow.orillialawnbowls.ca/uploads/1/3/1/3/131380183/5616965.pdfIn PDF document text
    • http://bizuvab.katasangkhae.com/uploads/1/3/1/8/131856005/xipajitekijiw.pdfIn PDF document text
    • http://files.distinctiveautomotivesales.com/uploads/1/3/2/6/132696111/bedovob.pdfIn PDF document text
    • http://kiguxog.judydeal.com/uploads/1/3/2/7/132712109/nuzexisotokura.pdfIn PDF document text
    • http://koxejade.coloursfresh.co.uk/uploads/1/3/1/8/131872225/guxemep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/i_40_accident_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/xujijit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/physiology_practical_book_ak_jain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/46501985209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9196/7652/files/51313897488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/91025842098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/54992567650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9209/9477/files/10498612882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/53143202430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/rogosutovinezagogamu.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 5552 bytes
SHA-256: 8b0dbecafa5ac27ccb663bc2fe9f516e42712e564bb3b5dbd445872f04dc5b51
font_01_sfnt_off0000783c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783C 10440 bytes
SHA-256: e5d8fa588fd4e1638aa3ba39ed7194831577b92dacbf046cf92a7beb9c32ad58
font_02_sfnt_off00009c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3C 16064 bytes
SHA-256: 1871dc7543e5fa9fd41f60a4858ce46ecd1ad89bb17f9a152d343f7cd3467385
font_03_sfnt_off0000b0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230