Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eb602443b2b0a9…

MALICIOUS

PDF

63.8 KB Created: 2020-08-23 11:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81b02b7da2394edeb4140936c647d2d8 SHA-1: 857291c462999b4356cc5c0291fd309f57d51326 SHA-256: 63eb602443b2b0a91f20ee84d25687b9678fe9287bcd8952db127c33a4fec077
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO poisoning scheme to lure users to malicious sites.

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=antipasto+pro+demi+bold+free
    • http://woxuv.florenceroadmarket.com/uploads/1/3/1/6/131637036/6417015.pdf
    • http://files.brickhousellamas.com/uploads/1/3/0/7/130739693/gexawenik_jozoboge_baberogezi.pdf
    • http://xuxuwowi.christineomalley.com/uploads/1/3/0/8/130874276/4bcf4f706.pdf
    • http://files.ourfaithfulhome.com/uploads/1/3/1/3/131381277/dakugivunoboz-lipep-nivetege-rosas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/minezavinal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5220/files/fitbit_blaze_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/uniqueness_theorem_electrostatics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7632/8355/files/lutavowebexozefop.pdf
    • https://cdn.shopify.com/s/files/1/0438/6347/4331/files/body_of_lies_english_subtitles_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/bibomunag.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2277/files/mijoxiwatasuvabi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/wozujef.pdf
    • https://cdn.shopify.com/s/files/1/0457/9409/9366/files/13103907749.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/87248000596.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_off00007f52.bin
8e4f5cb24014dd8f9b4bfcd5bf79e96432d286f6fcc6155dbc760d1702de7647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 5104 bytes
font_01_sfnt_off0000907f.bin
164d52a10dfb3f53a180b6b5d4ebe1c1c734e79ae1bca1f013d789a83e871b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907F 24552 bytes
font_02_sfnt_off0000cf1f.bin
fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1F 16084 bytes
font_03_sfnt_off0000e3d6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 4324 bytes

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