Malicious PDF — malware analysis report

Static analysis result for SHA-256 611171d548c9ecce…

MALICIOUS

PDF

109.8 KB Created: 2020-08-25 21:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b7bdf38f3ebf6377290be5f5c64cec SHA-1: 651222c517aa50c1711673f190c7f5da6ee3bbf1 SHA-256: 611171d548c9ecce1b5e335896fde0a98310531eae946084b7923c0950e2919b
162 Risk Score

Malware Insights

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

The PDF contains a lure for 'Crazy craft 2.0 download' and embeds numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=crazy+craft+2.+0+download'. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a phishing or scam attempt. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=crazy+craft+2.+0+download
    • http://files.stdavidsprimary.co.uk/uploads/1/3/2/7/132740525/608b6.pdf
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/1994931697.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6471/files/graphic_organizer_types.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/wijifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/jasikovegizusenutobuzivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/how_to_write_a_book_review_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/2791/4152/files/47785823248.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/gakazenidelazesajonuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/6336/0153/files/mean_median_mode_formulas_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0462/7618/2165/files/thanksgiving_worksheets_for_4th_grade_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/sound_blaster_audigy_fx_drivers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c81a.bin
f85580e28e098c6d7759d3ddd12eafeacaa9d0f1700048466b3b693b778e3ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC81A 43696 bytes
font_01_sfnt_off00014f36.bin
e083255f3cabb9dd66855d3e4a60be7f38dea93be3385c6b7cf93e4b22851634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F36 5292 bytes
font_02_sfnt_off00016164.bin
e824f2679112cf3a82c00c6c84821db25c22c2b59f15b2ae13eb4d0ffe7d2eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16164 16204 bytes
font_03_sfnt_off000193db.bin
90054bb35ccd42353db2b59c368ca84b45c98f1be7b19938c9f4d2099d6b91e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193DB 16424 bytes

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