Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e14eb0ebd9948ad…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 13:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf699b199dd6f409ffcf4998f2e09a6b SHA-1: 13330fbf835cf845c18f4ded9fc61d2e37d6308c SHA-256: 0e14eb0ebd9948adb2b08b7c6e8b2a0549ed3239f069d22db2538acedcb9fc41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The document body, while containing garbled text, also includes the URL 'https://ttraff.com/pify?keyword=candidiasis+bucal+ni%25C3%25B1os+pdf', indicating an attempt to direct users to malicious content. The presence of a link farm heuristic further supports the conclusion that this document is designed to drive traffic to external 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.com/pify?keyword=candidiasis+bucal+ni%25C3%25B1os+pdf
    • http://files.fromthelighthouse.org/uploads/1/3/2/6/132695472/682935.pdf
    • http://files.itsanaturalchoice.com/uploads/1/3/1/1/131163561/zabaw.pdf
    • http://files.peterdurst.com/uploads/1/3/1/4/131437848/jorurojama.pdf
    • http://files.trinitylutheranchurch.com/uploads/1/3/0/7/130738859/2085859.pdf
    • http://files.ladybugacres.com/uploads/1/3/0/7/130739202/diwudatow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/wimevonuxudamaziz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7079/files/nfl_schedule_week_14.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/palokasekew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/toxewigujemunipetaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/php_mysql_class.pdf
    • https://cdn.shopify.com/s/files/1/0436/9956/8795/files/budefalaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2472/files/advanced_hazmat_life_support_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/96797260799.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/dowebipiwoja.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/brinkman_smoker_instruction.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/xoxitodidobujaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/vugivivokow.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_off00007267.bin
271a32cbf7b6ddefc50921f6abc18ad475e262e7a8e40f5ff3649045e00b5c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 5312 bytes
font_01_sfnt_off00008443.bin
fda45596c8a6d0cd29a653e22d1c11b440e1ce4e03ee060403e7743f8b93c400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 10788 bytes

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