Malicious PDF — malware analysis report

Static analysis result for SHA-256 0613613f0a24c577…

MALICIOUS

PDF

38.0 KB Created: 2020-09-01 03:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e8e273926f9af79160d59c1162e44e SHA-1: bde9e0b6f210163df9d1afae5141434c23a6391f SHA-256: 0613613f0a24c5772f65198f090e91bb141b4acc0a3c7c112bf457ea04de709b
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure. The heuristic firings indicate this PDF is part of a link farm designed to direct users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely as a lure for phishing or SEO spam.

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.ru/wix?keyword=albino+darwin+carpet+python+information
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/gojijajiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/49011264908.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5661/files/ratevudigakupizudinoso.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/cheap_large_format_digital_camera.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/66321571075.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/totutuberigiwipajujok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/manawalemotugaje.pdf
    • https://cdn.shopify.com/s/files/1/0463/0439/5426/files/jepaleraxujexirefugen.pdf
    • https://static.usrfiles.com/ugd/9cc572_9a75d403bb0c48798feccff2f7558e2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e89481e684a14465a2f29f9b678df186.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d3f6d278d84667b42ec3c2829b52a1.pdf
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/94398983261.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/xutilalusijijesubofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/25913061880.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000499e.bin
4d62030c147867e71c11502b118c4968e01ae81c78623484de6fca74e6a8659f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x499E 5328 bytes
font_01_sfnt_off00005b9a.bin
10234644aadbaefd647f4eac03574ad6461e89111dde266f603d7fa6dde1423a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 9824 bytes
font_02_sfnt_off00007d04.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D04 4324 bytes

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