Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6e32d146926e40…

MALICIOUS

PDF

35.5 KB Created: 2020-09-04 02:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f4c0586c16ed2db84f38eca287adcf7 SHA-1: d35e7f362ae9541348dc5d589914b4d79ceeece3 SHA-256: 5c6e32d146926e40856de44037fb5a9f1787430d770034ffcee7e18717fa5d6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous links, including to a known malicious redirector, indicates a high likelihood of malicious intent.

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=adalla+majaka+telugu+movie+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/738632_8777b695e48a4aef96aa956a8d0405c9.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_d750f6b25ee54f768d79fccfe26d3784.pdf
    • https://static.usrfiles.com/ugd/724fb5_c12538a402374b418edca785dd2ff57d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c39ae288aa48338b4977a89dcd2e02.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/43953991722.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/9237864542.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/voxefuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/35587424007.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/52560201594.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/fulefogefedibifuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/65072530711.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/red_and_white_background_images.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/89396675541.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/zemupolarigixuxabexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.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_off00004cde.bin
72367fd0a68d1dd55742c28fb47a11b11b5a1b2934a99236b7d9aabcf2422431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDE 5236 bytes
font_01_sfnt_off00005eae.bin
31a73c48b2c3ad35b4defab199aee7ba3347dcf24f0250a5761d72c4d2ed02a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAE 10200 bytes

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