Malicious PDF — malware analysis report

Static analysis result for SHA-256 184ae9f35900d50d…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 04:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cab36766e73f8cd9311a5d082f13795 SHA-1: 5233ede1a9ba1963e773eb4e64a07d1a0d7848b4 SHA-256: 184ae9f35900d50d437dcb206d85a1055904ef188956e5fd71ac64ea2309b7c8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous other links to PDF files hosted on a similar domain indicates a potential link farm or SEO poisoning tactic to drive traffic 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.cc/wix?keyword=bejeweled+game+online+free+no+s
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a18aa6_fc22ca8465474e4396af369209bb012a.pdf
    • https://static.usrfiles.com/ugd/0f5b72_b672ce923984443c8208012d02c1c617.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b723ca448249d7b193bc810be51e90.pdf
    • https://static.usrfiles.com/ugd/63d3ad_d70b066aa848417089453dd1da5f08e4.pdf
    • https://static.usrfiles.com/ugd/2ca09c_92b17592795147e58d1e9ec7c4df5c01.pdf
    • https://static.usrfiles.com/ugd/b8c837_7856ee28c0c54251ac31d6212af5249c.pdf
    • https://static.usrfiles.com/ugd/44b221_61e4ab4557a5451d954494e2126b80cd.pdf
    • https://static.usrfiles.com/ugd/d775a9_5d5a4c6e69de4ffbb5ac17f228a0f813.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc9513cd8a3429c960734aaf5d32b0b.pdf
    • https://static.usrfiles.com/ugd/111c46_de4f876ea37848a9a25021477801acb7.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/dadonazivaxirow.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/pdf_xchange_editor_create_bookmarks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/investments_9th_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aefd942af7945398a92b6381d1191bc.pdf
    • https://static.usrfiles.com/ugd/fafc38_65f8d9f23d2547c0b7d4990a60f513c9.pdf
    • https://static.usrfiles.com/ugd/97634b_a598324e223249f6bb50feb4ae576df3.pdf
    • https://static.usrfiles.com/ugd/b0cd75_452ec424f4a94af6afa30f4bb8d26b38.pdf
    • https://static.usrfiles.com/ugd/913720_51acf251fc2f431588e48e25e8630277.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_off000062fe.bin
d73e81dee3868b30153b917d7c47f0304a8a5b808c1a9395276bf282f74f0658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 5444 bytes
font_01_sfnt_off00007589.bin
326cbc782ae19fc31948e421ced1081340cae653f5dec1e56faca71cebd34d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 11732 bytes

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