Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d06aa5da5c6824…

MALICIOUS

PDF

48.3 KB Created: 2020-08-25 15:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c7746ae7242d187658ec383eb7f1998 SHA-1: 866c4b77417ec76a2c2f3fe551fcc30d296a2e50 SHA-256: 15d06aa5da5c682458e52387651614416794e198380e8ace076445a0fa2caa0f
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a URL shortener that redirects to other PDF files. The primary redirector URL is https://ttraff.cc/pify?keyword=lagu+bungong+jeumpa+berasal+dari+aceh, which is flagged as malicious. The document's structure suggests it is part of a link farm or SEO manipulation scheme designed 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.cc/pify?keyword=lagu+bungong+jeumpa+berasal+dari+aceh
    • http://files.megannasto.com/uploads/1/3/1/4/131453294/zisudifosep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/wesedovafisifiwepotidowos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/xusuwawugoxigikukemab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5253/0845/files/xixafizikesidawazalil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/riraxusupamomavepatebupov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/13072089940.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/educated_unemployment_in_kerala.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/6615303141.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/cirrosis_hepatica_tratamiento_farmacologico.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/lalutekanavusowadevirot.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/topevakizomivasasa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005920.bin
ab88c4a328398723747778cc03cf62f428aca1bda23ccdd90ea75589bf18a3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 5448 bytes
font_01_sfnt_off00006b64.bin
2b629927bf2a5dbd0868a502c1720876d615c003fddd19636447f7e7f2106d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B64 10212 bytes
font_02_sfnt_off00008e92.bin
8815a1229c645ea1cf9789a95c98fb88cefa43383f0c3cf1b06e4a613c5be5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E92 16752 bytes
font_03_sfnt_off0000a612.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA612 4324 bytes

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