Malicious PDF — malware analysis report

Static analysis result for SHA-256 10486eca8c0935ce…

MALICIOUS

PDF

41.6 KB Created: 2020-07-08 16:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74acc72bd3f3d52e77303b3c9de4c0af SHA-1: 77cb026bc802d4027dbb595b61976e1ac77b80d9 SHA-256: 10486eca8c0935cee03baf5c09790ddd9e3b9fb409bdfd161856f30b2d99fd86
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes a URL that points to a redirector service, suggesting an attempt to lead users to malicious content. The presence of numerous external links also indicates a potential link farm or SEO spam operation.

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=understanding+anatomy+and+physiology+gale+sloan+thompson+pdf
    • http://files.beitnachum.org/uploads/1/3/1/4/131483253/ximegigojepirez_rabisosip_suwupisi.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://files.klmsdrama.com/uploads/1/3/1/4/131407823/4741481.pdf
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdf
    • http://files.hlfmgoats.com/uploads/1/3/1/3/131383553/jopaxubesoz.pdf
    • http://files.officialbriarrose.com/uploads/1/3/1/6/131606674/rewidamalu.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://futidufesag.files.wordpress.com/2020/07/kabidizakebisox.pdf
    • https://dixurozazix.files.wordpress.com/2020/06/piruxi.pdf
    • https://didawoza834803593.files.wordpress.com/2020/07/12731317365.pdf
    • https://nuwasiv.files.wordpress.com/2020/06/71684099734.pdf
    • https://zivuwisi.files.wordpress.com/2020/07/vumuwafoxise.pdf
    • https://dozinakisaj.files.wordpress.com/2020/07/53173013579.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.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_off000063ff.bin
725b89c9e57a0ea7f8450da76070f41222047415122cccf7257d453bcd521ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 5336 bytes
font_01_sfnt_off000075f9.bin
72f862168b208a1af56db85d06653feced5bb38b497e338397045cb34bf5a4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 10260 bytes

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