Malicious PDF — malware analysis report

Static analysis result for SHA-256 11466fcddb69b7dc…

MALICIOUS

PDF

73.6 KB Created: 2020-08-19 21:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9bdc5ca4bcb0b5b87b5506eb2633d62 SHA-1: 5fd6ebbb36553ecfc3839567e6943460992a5acd SHA-256: 11466fcddb69b7dc8a5330ce0605ffcad443af3937b8c4a6eca9cca797e674dd
154 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a malicious redirector and part of a link farm, with multiple embedded URLs pointing to Shopify. One primary URL, 'https://ttraff.com/pify?keyword=eiche+blattform+beschreibung', is flagged as malicious. The document body, though heavily obfuscated, contains this malicious URL, suggesting the file's purpose is to redirect users to potentially harmful content through a deceptive link.

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/pify?keyword=eiche+blattform+beschreibung
    • http://files.global-self-storage.com/uploads/1/3/0/7/130739298/fudulut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/learning_carpentry.pdf
    • https://cdn.shopify.com/s/files/1/0440/2960/8101/files/jijazofinujulijonexusawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/33215814398.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/24778629996.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/pelizakodefim.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/bazuxoxuvixijetuwobola.pdf
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/51708801585.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/la_arqueologa_del_saber_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/ayyappa_swamy_kannada_all_songs.pdf
    • https://cdn.shopify.com/s/files/1/0447/0875/7660/files/rilazabagiwiniruje.pdf
    • https://cdn.shopify.com/s/files/1/0436/5120/3225/files/49707721452.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/geotechnical_laboratory_testing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34f.bin
9420c83d260252686c7afa0431521ed3c5a53e92450de508f5cc97cfa45a8b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 3376 bytes
font_01_sfnt_off0000df6b.bin
73611b57a897c21e35be50814532942648ac821e3743eb7c90c25b34e0b96dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 5392 bytes
font_02_sfnt_off0000f19e.bin
3696b56e121e8a6a1cec7cbff7d2353dd31613b6489240ec038b264ec26b3d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 11680 bytes

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