Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b23232bdbd49d7…

MALICIOUS

PDF

48.8 KB Created: 2020-08-19 21:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748854ec561dbb2a7f0e57cecb04d786 SHA-1: b1ddc6e9d53d3808e32bbb597cbd4259db57adec SHA-256: d4b23232bdbd49d7481595a2b3108bf1e3253d4d2fe7129ce37ec70a08dd4452
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=alcohol+during+pregnancy+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, reinforcing the lure mechanism.

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.com/pify?keyword=alcohol+during+pregnancy+pdf
    • http://wizuvepur.mountainedgeveterinarytechnology.com/uploads/1/3/1/4/131453784/8193046.pdf
    • http://fepedez.a-e-g.org.uk/uploads/1/3/1/8/131871479/xobam.pdf
    • http://raxisufu.theoriginalshepherdsrodmessage.com/uploads/1/3/0/7/130776783/7526410.pdf
    • http://bixafevum.xbotrobotics.org/uploads/1/3/1/4/131453850/voxisevudedaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/norubavusazuvavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/baseband_6630_ericsson.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/14396936021.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/math_worksheets_grade_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/xanejigosip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/aptitude_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/tefiravimobitus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/biology_of_belief_bruce_lipton_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/86503645910.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/78642989634.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/wurisurefalanekapofabaga.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/echo_srm_225_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6841/4370/files/38268328335.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/69334987548.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_off000080de.bin
81722a7e89af72bbb3e6dadedc1ceb0c5272b9a4209c02f412fb39f190366dc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 5332 bytes
font_01_sfnt_off000092fc.bin
5c0501b4efe2019e94c140f24c1845153a96eb19664aca6284ab2d6916c00e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x92FC 10280 bytes