Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dd8e06758d291b…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 10:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 233e7f616d8569eda3c7d5f4d42b3aa1 SHA-1: 16a2df0705bd6c0003f298703087d9be859d8b75 SHA-256: 87dd8e06758d291b030720ad02d4ca71004fcdece7fbe64e44d2ba74bcf239ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to create an SEO link farm, directing users through a malicious redirector to download other files. The primary redirector URL is 'https://ttraff.cc/pify?keyword=the+ugly+duckling+story+with+pictures+pdf', which is a known malicious infrastructure. This pattern suggests a phishing or malware distribution campaign, likely initiated via spearphishing.

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=the+ugly+duckling+story+with+pictures+pdf In PDF document text
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.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/1/0429/6297/6921/files/61919561837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/joomla_travel_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/agriculture_filetype.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/49556392550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/best_high_graphics_android_racing_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/refediximafufomatuxolifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/63_chevy_truck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/tasekiwulekerenujurewopes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A97 5416 bytes
SHA-256: 213d64812cb0ac9a890976bb7baae19247e03c9ca0734c25ce42505c4747cf72
font_01_sfnt_off00006d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 10140 bytes
SHA-256: 6b92e4833c95f9bef08adb9c48cfc9dd72fba15e296eec2b92727a8014f6edc6