Malicious PDF — malware analysis report

Static analysis result for SHA-256 17abbc07a4c78bfa…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 04:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781b56059af86b7487f78bcef1ab45f2 SHA-1: 6c92f9ecc9f2422f623f59fbcf0fb37f2a98735c SHA-256: 17abbc07a4c78bfa019100dd68fbe560d96dd69c6af768226dc834766634ee70
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link list, suggesting an attempt to lure users to malicious sites. The primary attack pattern appears to be a link-based lure, potentially for phishing or malware distribution.

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=aryavarta+chronicles+book+1+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_acfffb4ccc3644329500c1ea517f5368.pdf
    • https://static.usrfiles.com/ugd/30e015_314462afb5774872a2b6f8f843edfc83.pdf
    • https://static.usrfiles.com/ugd/834936_209c2351a665415584ece1bff8ef9c8f.pdf
    • https://static.usrfiles.com/ugd/6f53d7_67945b11f9884d3d9a1dba03ac6aa566.pdf
    • https://static.usrfiles.com/ugd/0c4177_6ed4987918094719959a067df9aab836.pdf
    • https://static.usrfiles.com/ugd/72216b_3bb2f82e38a043c8a9b05bf4b64a2da7.pdf
    • https://static.usrfiles.com/ugd/cc14e4_4df9bfba478f461d9eda3a7a9f7e03c0.pdf
    • https://static.usrfiles.com/ugd/2ca09c_badeb124c0e74c32a245ea502208a348.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e476fb881f4d30ba11ea5f63b6d2c8.pdf
    • https://static.usrfiles.com/ugd/6cfc61_3f05ab21c0c44a2d8b095091ec99b7a5.pdf
    • https://static.usrfiles.com/ugd/0c268c_12306ac79bb34be58c26f69bfb6e8bd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ee06d60f0284a798a6b926a51b6b185.pdf
    • https://static.usrfiles.com/ugd/b8c837_07194948e0f94b1e95d745f6ae29c3ba.pdf
    • https://static.usrfiles.com/ugd/e3c460_808a478ba1a2451fb46c48be748717cf.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_off00006f01.bin
afd03ba7fab41b41206c6fd0d71dd186edf407618f4e42a00634b9b799d7a2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 5652 bytes
font_01_sfnt_off00008233.bin
4d887d8b6f55dbae69a8d8b5c7d897eec31ad39ec4ad50d76b90090199bfaa75
pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 10204 bytes