Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dd5bc64534dbe6…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 03:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee30c0daa2069da9f1b2a19174a20f5 SHA-1: 27b20da3b77539ca7fbeec7ac1602cf23dda71c6 SHA-256: 24dd5bc64534dbe6d8d112e10393a794aa90c0b7e837404a32a17c15f09a48d0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a link farm with numerous external PDF links. One of the primary links, 'https://ttraff.com/wix?keyword=foundation+building+materials+inc+annual+report', points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to a report and the redirector URL, suggesting a lure to a malicious 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.com/wix?keyword=foundation+building+materials+inc+annual+report
    • https://static.usrfiles.com/ugd/3f80ec_f0b50f2959a44ed08bdaf6c4cae5904e.pdf
    • https://static.usrfiles.com/ugd/b4609a_7ef4955173d94576a734a8d2894d3afa.pdf
    • https://static.usrfiles.com/ugd/a91264_6ecd0797b8de4f31bdcfef4d44a629fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0488c9653454262809efc29948d737d.pdf
    • https://static.usrfiles.com/ugd/09273f_9215ba2af6cc451688e7f976f85d0f68.pdf
    • https://static.usrfiles.com/ugd/5ecadc_4bdd466b2763423bb737abe61c42be3b.pdf
    • https://static.usrfiles.com/ugd/dc98cc_b7895f63b34f49e9891a8b5adf47b1ee.pdf
    • https://static.usrfiles.com/ugd/76de1a_c7d8e8fc41a54f8a8d9ae7393e4c9972.pdf
    • https://static.usrfiles.com/ugd/b8c837_04244193227144738393786ac1a82aa0.pdf
    • https://static.usrfiles.com/ugd/d5d855_1f969a397f9a4e88b826766727cce30f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c4349fc533a46c39ccbfe5254846de7.pdf
    • https://static.usrfiles.com/ugd/856cea_79fbed8e88f841b5b2e4e9c0d2893b1e.pdf
    • https://static.usrfiles.com/ugd/b5472a_5320d9e8fcc04ab5865c1eb462657cfa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/jijojexifegitub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9340/1501/files/japasiwemufaxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/28828096376.pdf
    • https://cdn.shopify.com/s/files/1/0439/2747/0235/files/gaken.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/punjabi_couple_wallpaper_full_hd.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_off0000777d.bin
9cea7bce73b105cd3284bc309a14860b6bd3fb0bfcae88a49e391aae2a241af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 5488 bytes
font_01_sfnt_off00008a0c.bin
1c4d3ba7607c26dc323c903394d471ddcc354f50ab645c54d1696c3a4d629219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0C 11016 bytes

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