Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddee1f3130e6ba5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 06:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3837f46d32a1b98cd860083c027e6f SHA-1: e72597969536acd4e83c44cb7837392a948dc431 SHA-256: 0ddee1f3130e6ba5f6261aeceeb42ff36a28777d8a1d10f557b3377c487c97d8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though partially corrupted, contains a URL that leads to a redirector designed to send users to potentially malicious content. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to generate traffic or distribute malware.

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=bbq+sauce+nutrition+information
    • http://files.pacificbrows.co.uk/uploads/1/3/1/1/131164573/ce04e422d.pdf
    • http://tituw.justinshaginawptatc.com/uploads/1/3/1/4/131454207/0e644dc5b8085e.pdf
    • http://files.hornedreaders.net/uploads/1/3/1/4/131483371/0b0ebfc.pdf
    • http://files.pacificshoresmusic.com/uploads/1/3/1/4/131453399/niberaregorizilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/93110838553.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/47763615095.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/zaxewerumovesujuxexalaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/jesus_culture_holy_spirit_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/maryland_state_board_of_cosmetologists.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/adobe_reader_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/a_hat_in_time_level_editor.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/search_engine_optimization_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/sesujexeniloju.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/sorting_and_searching_algorithms_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/free_candy_camera_new_version.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_off00005e47.bin
326123bbeaa7ebb5d1812332312649e4c865f2a14a58d49ef56c4c4c98dfd2a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E47 5312 bytes
font_01_sfnt_off0000703f.bin
a8b9c45154da29a329e6250d262d340927d1b2adbb21fcd4f9483c43adf6df07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 10080 bytes

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