Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e51928dbb343f11…

MALICIOUS

PDF

59.8 KB Created: 2020-09-02 17:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123abfff1f0e7002cd40aa46f5813a7f SHA-1: f236575fcc536ddb40de74d143d95288c1cbcbfa SHA-256: 6e51928dbb343f116cd3bcb274f3ad2a9c4c3db29f229e00c0f9cf54ee3111b8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a search result. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of numerous external PDF links further indicates 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.com/wix?keyword=arboles+de+decision+ejemplos+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3794ad_2ec7e32f001a42c293efa96685965073.pdf
    • https://static.usrfiles.com/ugd/1b8612_d1138fc4345147429985fdb73e7f8f2c.pdf
    • https://static.usrfiles.com/ugd/405339_6eb66033e57e4f9a9a296f3aded08b34.pdf
    • https://static.usrfiles.com/ugd/0c268c_612922b9f3354bebb6f25595b78b38a7.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_88fa610d542d4cf497f8308073677f95.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_f24c2230be3c4e899383c53448f1e897.pdf
    • https://static.usrfiles.com/ugd/b8c837_60f6ca8c0a3c476386ae334300d93b9f.pdf
    • https://static.usrfiles.com/ugd/f09a9d_3a89c920d9364f16ba4f62162cfcfa12.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/bible_download_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/90620743093.pdf
    • https://static.usrfiles.com/ugd/b8c837_331ad7e87edc4c14a3869fe8a9245b56.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_5e0c78b3c4e347ef9320084217cbd317.pdf
    • https://static.usrfiles.com/ugd/1decf9_ea3b22a3d4694a61907bbd11b755f27c.pdf
    • https://static.usrfiles.com/ugd/cc14e4_7248eadbf7934dd483a67a139899a2e7.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008937.bin
2ee9ef3fef0f96279760083ce58f40c9cef6a9823bb425f8ce4bf0d5bb00f193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 5296 bytes
font_01_sfnt_off00009b29.bin
913043cbd4f8094e7baefeb7bfb606b16bc5d2278c3e795d53d6dda1d8e257d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B29 15364 bytes
font_02_sfnt_off0000cb2e.bin
c86dd2e8eb9073f5525c3b0ae269a7213f91b44edbf915aca2fe1d7e9d6d56b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 16144 bytes

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