Malicious PDF — malware analysis report

Static analysis result for SHA-256 93714906c6fc00a7…

MALICIOUS

PDF

50.5 KB Created: 2020-08-06 10:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1219cad2850e9270e321d07ae1797491 SHA-1: 3c9507dce27ff006ca298f8dbab66aef6f5a6647 SHA-256: 93714906c6fc00a782d749d8ef9199f578f35f1d41010b795ed32537d1c5865c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL that triggers the malicious redirector, indicating a lure to a potentially harmful site.

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.ru/pify?keyword=security+risk+assessment+methodology+pdf
    • http://files.saltlakeconference.com/uploads/1/3/1/4/131453024/7536486.pdf
    • http://files.filmlovables.com/uploads/1/3/2/6/132681384/dosolupadopivexe.pdf
    • http://files.norwoodcycleclub.org.uk/uploads/1/3/1/3/131384281/361887.pdf
    • http://files.azpretile.com/uploads/1/3/1/4/131453919/8e886027c24e.pdf
    • http://memile.alphabetspeechtherapy.co.uk/uploads/1/3/1/4/131482975/biselodivala-dukon-wasepexad-fixasezibup.pdf
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/what_is_the_color_code_for_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/understanding_analysis_abbott_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/xitisojimefonikezizur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/21950905046.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/data_science_bootcamp.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/93391648082.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/fowuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/how_to_block_someone_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/pebuvori.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1577/files/matplotlib_contour_plot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/36565814042.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_off000083de.bin
2fa632141d8cb25cd55312a20d79f0cb2d0c20d93add96d7f2b01847f0809ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 5836 bytes
font_01_sfnt_off000097a6.bin
b2df3c44d8380d4ed40ae6f91b76cc0056dea40534c8d50538ef0205536185c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A6 11124 bytes

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