Malicious PDF — malware analysis report

Static analysis result for SHA-256 8097b25733833625…

MALICIOUS

PDF

43.4 KB Created: 2020-08-01 20:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5685a870a22d4321000b97c88fa8e2ee SHA-1: 2eea0b185ce8f98342de21d47d87822f0a6fecc8 SHA-256: 8097b25733833625904b36099be85331cd27d06318d3246ec91bf2508954724c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, with one identified as a malicious redirector pointing to a URL related to 'microsoft remote desktop mac'. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document's content is designed to trick users into installing or using remote support tools. The presence of a malicious redirector suggests an attempt to lead the user to a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.com/pify?keyword=microsoft+remote+desktop+mac
    • http://files.askeaton.coralleisure.ie/uploads/1/3/1/4/131407958/1867603.pdf
    • http://files.ballboss-stories.com/uploads/1/3/1/8/131856374/tabepadozirewow_bigukatavewa.pdf
    • http://files.kelseapiquette.com/uploads/1/3/1/4/131406202/fe3e08.pdf
    • http://files.moniquekrose.com/uploads/1/3/1/3/131398360/sivunezamiwitex-xageris-bijekafi.pdf
    • http://files.fohhincanvas.com/uploads/1/3/1/1/131163635/kawipod-mebofosijed-goluwizofusopa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/futixosipubox.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/16302828379.pdf
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/18766387123.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/6627938419.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/12281441023.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/77370402963.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/54305928506.pdf
    • https://cdn.shopify.com/s/files/1/0433/4764/0469/files/58021588959.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/kixutaxibarogunapuluvoni.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/91960428610.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.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_off00006adc.bin
924dd5aafb15c9d54a9acf95e916a88e222fb689a8805490ee73d553d151bdec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 5336 bytes
font_01_sfnt_off00007cfb.bin
547c10e1e1b5ab28c84f5cdc7dc60c2f7f9c4ea5553ddffbf6f1590491c373ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB 10576 bytes

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