Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38adb4f69bb761f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 11:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04ab9ac10645720166c10f2034e6369 SHA-1: 1b7a669649c46e5abe67a64c2e47ec7dcd10b026 SHA-256: e38adb4f69bb761fa62b3fa9b8cf5e28ac8de5a61522cbf9305a603b65fdd5ea
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Tv live apk 2019' and the authoring application 'wkhtmltopdf', suggesting a lure for users to download an application. The presence of a link farm heuristic further indicates an attempt to distribute content via numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=tv+live+apk+2019
    • http://nomamoke.plasticdolls.co/uploads/1/3/2/6/132681482/fupixagusofutujefi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3000/1302/files/90591466814.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/mofevupudarixedanosozas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/paxasogizizigalirud.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/sukubukojozumaxixoleme.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/bkat_test_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3791/files/29453580599.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/xasuvoxijugigejomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0428/1440/6823/files/77692017809.pdf
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/setonok.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619a.bin
2dec3f1bf7bc9edc628371f2f2f1b4c61878276dcbad956593f6becc14a5c80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619A 5092 bytes
font_01_sfnt_off0000730a.bin
6c47b3186c9e3a54518adf64b5b02ab63dbcee3b287a0c4473baf1042d6311f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 10328 bytes

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