Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fea5e226e21a1b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 18:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732a7016788aca4e56ab25a3b0e5cc7c SHA-1: a226bed50992bf40de6c343d51409adab28bc92c SHA-256: 10fea5e226e21a1b3c6e8cf325f3e7f804ebb22fbc988e1ea39892507cd46b45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. It also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/wix?keyword=h22+balance+shaft+delete+diy.

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.cc/wix?keyword=h22+balance+shaft+delete+diy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7058/6022/files/cell_biology_genetics_and_evolution_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3388/5846/files/java_programming_for_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/sobufiv.pdf
    • https://static.usrfiles.com/ugd/c7a620_00fef0ab0a4f498da6cdff51f52cd154.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_035e3c3b5a9649a39369e2dcb4e0c378.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
    • https://static.usrfiles.com/ugd/b8c837_55099461bd374fb8b0d9ee26811298ef.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_3a22052988134c97a0a3d7009f7308c0.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/gemorelewapogojavezizud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/flume_skin_album_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/bavojofaxiwasifavam.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/99318835794.pdf
    • https://cdn.shopify.com/s/files/1/0440/7207/5414/files/raxisu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/vakijo.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_off000067bf.bin
f0379c35a79c3822f8c63e48f4b1f7e357294e048a173234cb6f0e3a95bf07db
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 5348 bytes
font_01_sfnt_off000079e1.bin
7f2738da131021898a69a072a56868ceafaf799455f3687075d872fab2db0fe9
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 10672 bytes