Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3a93c1540536e2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 20:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7616d3ef2d32156d6ac5605a61c1455 SHA-1: c7a3325170e7cd9007bcb7813d291feda85319bc SHA-256: 6e3a93c1540536e28855375e82cd63d605148640b2f493f376cb77b0ad856a1d
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links, many of which point to Shopify domains hosting other PDFs. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm, further supporting the malicious intent of redirecting users to potentially harmful content.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=happy+birthday+balloons+vector+free
    • http://files.ietchstuff.com/uploads/1/3/1/3/131379868/zopemoj.pdf
    • http://files.deltabluesfestival.net/uploads/1/3/1/3/131398504/redek.pdf
    • http://duxam.danielleozymandias.com/uploads/1/3/0/7/130776106/fuganutug.pdf
    • http://zefedafa.icycurls.co.uk/uploads/1/3/1/4/131453109/donimezesupolalegize.pdf
    • http://getides.clearriverredangus.com/uploads/1/3/2/6/132695575/zibopo_vegaloduwipagu_zijiboxavepir_segabamix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/73825080992.pdf
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/bhagavad_gita_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/jowufufugeranigapimipibeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/random_string_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/miwavifepipufipokegobizil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2115/files/bed_cet_2020_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/abridged_version_of_frankenstein.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/analytical_chemistry_by_gd_christian_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/davib.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/lejuvokimigepidus.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_off00006144.bin
167170a5a5e5daf4d192f85e8a8045b7307541323d4813eeb83fdfea5fa746fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 5508 bytes
font_01_sfnt_off000073f7.bin
97bdc0e9ba92302d2bb3cd3457e0bf2269f4380c0383548411d7736ecd2e362d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 12152 bytes

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