Malicious PDF — malware analysis report

Static analysis result for SHA-256 104330c8ae868fd6…

MALICIOUS

PDF

47.0 KB Created: 2020-08-21 11:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d3dddb831571f81f63a048722ed437f SHA-1: 18af0244757a70bf00baae5b841ef0eb62b7d68b SHA-256: 104330c8ae868fd6ed2c9a7f5faa1b19a5abd67f2b2a2afa955217ddce931f82
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Adblock f

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=adblock+f%25C3%25BCr+opera++chip
    • http://zijaf.ccepotomac.org/uploads/1/3/1/8/131857120/4922037.pdf
    • http://wobivu.samanthapassaniti.com/uploads/1/3/0/8/130874329/8977066.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/mimejimavelakopigusatod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/30794664618.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/leduxanopedadarero.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9681/files/54122174476.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/the_directory_is_missing_a_launcher_profile.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/accomplishing_the_impossible.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6662/files/aspects_in_astrology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/68424622198.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/bivejara.pdf
    • https://cdn.shopify.com/s/files/1/0436/1161/9491/files/chaityavandan_vidhi_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/188427803.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/dehydrator_sheets_teflex.pdf
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/aadhar_card_application_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/aadhaar_form_download_in.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006141.bin
0619ccd7fcd451115396a316b6c632afd4aa7d295edc2ddc603140a2e845b93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 5376 bytes
font_01_sfnt_off0000734a.bin
22a4dbe3c37c0723782d8a93d13cd4db93eef64769001b171557dda30d70c1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734A 11160 bytes
font_02_sfnt_off00009866.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9866 16092 bytes

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