Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf731e550eee360…

MALICIOUS

PDF

44.0 KB Created: 2020-08-21 16:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 905fb5bb9f76b9e6e58ddb991f2b300b SHA-1: d1cb2897c18c9398477e42d91a8e8651a125f9dd SHA-256: 4cf731e550eee360bf5ac795d114e205dfef391f518a3b837c28532c520c0663
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=actividad+epileptiforme+generalizada. The document body contains garbled text but also includes the same malicious URL, reinforcing its presence. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=actividad+epileptiforme+generalizada
    • http://files.clkdesign.ca/uploads/1/3/1/6/131606630/fogamo_dilufaresusaxek.pdf
    • http://milikugeg.suelidesigns.com/uploads/1/3/1/3/131398440/3792034.pdf
    • http://files.detourtowonderland.com/uploads/1/3/1/3/131381675/pikixebikosalop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/sabufurobobusatovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/98298120210.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/bamekigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/japobogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/introduction_to_general_zoology.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/madhyamam_malayalam_calendar_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/32975760101.pdf
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/nagig.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/adecco_salary_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/clumsy_ninja_mod_money_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/spectral_and_magnetic_properties_of_lanthanides_and_actinides.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/33826888177.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/96306380255.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a52.bin
8e26f30b044d3a665ac6c905897c47a1522242a2975402898b9bae5567dd4a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A52 5396 bytes
font_01_sfnt_off00007c9d.bin
682ed2e97ea21806781374621d98d14880fac549b9ae18f94a85336b81533f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9D 11440 bytes

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