Malicious PDF — malware analysis report

Static analysis result for SHA-256 0341691a633b4785…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 04:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c232de382fc10fdd4540eec0432376b4 SHA-1: 4fe58405c3473b718eb5fdbec95f1a08004a43da SHA-256: 0341691a633b4785dde1f148a8b61b9464148f31776587a40af96786fcf792a2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a physics guide, directing users to the malicious URL. The presence of many links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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.me/wix?keyword=the+manga+guide+to+physics+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/migululekeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/the_value_of_everything_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/delejajidinebomevanewobiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/28072903881.pdf
    • https://static.usrfiles.com/ugd/9219f8_0fb513d705fc4fcf9cbfab4e487eea28.pdf
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdf
    • https://static.usrfiles.com/ugd/9219f8_26c5784895f74a5db498b4a087dd767d.pdf
    • https://static.usrfiles.com/ugd/83b1b3_f3a3b6b46a1f4eb39b3df7f44010b5df.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae777784bb4397a14ffd8809009b05.pdf
    • https://static.usrfiles.com/ugd/98e298_720b414dabb740e69369b7222b7b4617.pdf
    • https://static.usrfiles.com/ugd/b8c837_a93371743a91452c8209e6108ff0f505.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
    • https://static.usrfiles.com/ugd/bb13a2_01c147f0c9154e249b78616180c30f84.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d787bbd8e0d44fdb1837c1c99718a4e.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_off00006411.bin
f8b1d55fab40537bbc691294efe2b334e64a1db493a66b0c45bc03ae3f86b4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6411 5444 bytes
font_01_sfnt_off0000767a.bin
b1c7cec263eaa82d9265606cd9ade96764860f72a8192dd9e1a4c19fedae6ec7
pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 10164 bytes