Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f55f00de7ac7ff6…

MALICIOUS

PDF

66.2 KB Created: 2020-08-14 10:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22aa7442d54ec6ab9cebbf7c4ba86b3d SHA-1: 488a10509c435450dd5362c67684c0c83cb3e81e SHA-256: 8f55f00de7ac7ff61f3c182c40a08cb091bddfa335fb2bc0c88cb3ee3fbc9230
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Lpg gas sensor working pdf' and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious content.

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.cc/wb?keyword=lpg%20gas%20sensor%20working%20pdf
    • http://files.kalaitzakisdesigns.com.au/uploads/1/3/1/3/131383651/muvapa_serozulo_pizunabivo_tuvex.pdf
    • http://files.eliotchurch.org/uploads/1/3/1/4/131483002/wuwavevokidivizuvuvo.pdf
    • http://rawepiwa.paperboyproductions.net/uploads/1/3/1/1/131163599/5342072.pdf
    • http://folitu.revgretchenweis.com/uploads/1/3/0/8/130873951/nofunotu_gobazimudada_vovixadifiwitof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/55200875512.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/46766937156.pdf
    • https://cdn.shopify.com/s/files/1/0434/9512/9254/files/xezubojud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/34842035044.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/5x5_sliding_puzzle_solver.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7860/5218/files/el_camino_del_artista_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/1012066414.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/pub_535.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/examples_of_acronym_word_formation.pdf
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/egyptian_kabbalah.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/46519079428.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/gaxapatow.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/49559565994.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/conjunction_grammar.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5db.bin
1d2068e5516be64ebade589e3884e7fbe865024d9a418ab54cc760ce8ef2e9fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DB 5272 bytes
font_01_sfnt_off0000d7ef.bin
9726541b8d8156efb352c84032428c4df492c362c36cde11f841db6244689bd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 10444 bytes

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