Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a1be72d4a47c9b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 17:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16c990e79563010df8a58eedde102e4 SHA-1: 44c9c7dc6ae10e7ad0932c2e1b030c6bae13f371 SHA-256: e6a1be72d4a47c9b5d71c2d392341990b796fb1313e0c5eab86465cd56dab083
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=blank+venn+diagram+template+microsoft+word', is designed to redirect users to potentially harmful content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains, but the primary malicious redirector is the key indicator. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=blank+venn+diagram+template+microsoft+word
    • http://files.northernillinoispainting.com/uploads/1/3/1/6/131636764/xasuritiw-gugibugove-walesalo-papogizojizidi.pdf
    • http://vupar.rbcrowtherco.com/uploads/1/3/1/1/131164250/jamekazowaweb_mibevozileb_roxuwumitifuzob.pdf
    • http://files.thepaulbr.org/uploads/1/3/2/6/132680949/1370533.pdf
    • http://wubiv.alexandriatalley.com/uploads/1/3/0/7/130775565/tejexexetanonot_lomudi_lobokojoxo_vatexiwes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/therapeutic_classification_of_drugs_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/check_your_aviation_english_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/systematics_of_living_organisms_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7875/4199/files/49171633138.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/pdf_the_new_oxford_annotated_bible_with_apocrypha_new_revised.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/vonodalag.pdf
    • https://cdn.shopify.com/s/files/1/0457/4576/6556/files/valentine_s_day_esl_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/home_automation_using_arduino_and_bluetooth_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/valkyria_chronicles_4_squad_stories_guide.pdf
    • https://cdn.shopify.com/s/files/1/0460/2416/3487/files/86179374394.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/xozebebigepizopofezuvale.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_off0000650b.bin
f048d1ba4042c9be8aa560be27a9fd6376494cb47afb4fe8b2d4838ffd2ac1ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 5740 bytes
font_01_sfnt_off00007891.bin
f07229c0629e7beca12e2290df9a02ce3af3df7c604f57467ea020b89cfa1616
pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 9920 bytes