Malicious PDF — malware analysis report

Static analysis result for SHA-256 684bfb20d882f9f4…

MALICIOUS

PDF

37.4 KB Created: 2020-08-31 08:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a98b95d0a0015bfb5dcbefdea63131c SHA-1: 255d0aa7cf8e0dc087bf7a82a1cbe126013801dd SHA-256: 684bfb20d882f9f42c5285404c6346422a25ae42e56c6a5119622e20e7c505e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, a common tactic for SEO link farms and phishing campaigns. One of the primary links, 'https://ttraff.com/wix?keyword=hotel+transylvania+2+t%25C3%25BCrk%25C3%25A7', is flagged as a known malicious redirector. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=hotel+transylvania+2+t%25C3%25BCrk%25C3%25A7
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/puzonitagenaxosawipibogop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/gugupivuzoguwipezisijul.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/disadvantages_of_computer_assisted_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/8596686299.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/23295884527.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/labour_costing_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/87389206185.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/barney_theme_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0406/files/beta_house_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/kexagusu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/john_deere_la_115_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/kofagaluvobexagilaxitegeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005243.bin
917f6c42c634787cb21aafc28e87ac8ec5205a1af17bcd0c8484363122ee95de
pdf-font-stream PDF embedded font (sfnt) at offset 0x5243 5300 bytes
font_01_sfnt_off0000642d.bin
ecf66374921e2b0ee42adfdd4b40ea838602d8102d0e550a661bdcbdc23e1830
pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 11284 bytes