Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6065e93693919a…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 14:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 904045125462a3cbad74e752cb207955 SHA-1: 0258c05dcf32efabb9f8416e41b5e84e80e1eb8b SHA-256: 5e6065e93693919a387277f3e8aa0bd0275da067721f3a38f9535165a23a3db9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body also contains a URL that is likely part of a link farm, designed to attract traffic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is intended to redirect users to harmful sites.

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.cc/pify?keyword=bioscope+apk+old+version
    • http://wexupe.chasetaylorhackett.com/uploads/1/3/2/8/132815986/wulutasozu-zoribewabimut-fariwibino-xiwekoligala.pdf
    • http://files.aittransmission.com/uploads/1/3/0/8/130814297/22eb089db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/migag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/tubetoben.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/93_dodge_dakota.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/gujajobokapixi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/skin_creator_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/vovuwib.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/zitolakejobaweguxezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1013/8017/files/bixuxobogex.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/3342554924.pdf
    • https://cdn.shopify.com/s/files/1/0434/1291/4332/files/4491678312.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/kronos_4500_time_clock_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/rixedebekesorugasixofi.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_off00005bbf.bin
96c47da85d9c1e2e1ba2966eb616551bfa5b4fc4610e75f57098aa6c016a3470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBF 5240 bytes
font_01_sfnt_off00006da2.bin
d450c7fb1e0d59f3606230aef3f018d18cf77a52462d5c934d8b59e8d39d1a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA2 10192 bytes
font_02_sfnt_off000090cf.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CF 16092 bytes

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