Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69edea4ba0492fd…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 10:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a07f59f7a2c68ff0dad17e729a955328 SHA-1: 45666fcc9f93b1bb9cb2ddcc3369f8d6b55d5bbd SHA-256: c69edea4ba0492fd8350fda677c3eacd6667f0c447bd0ab0a184c2e633fe3b0c
150 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially garbled, suggests a lure related to an 'attendance allowance app form'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The primary malicious URL identified is ttraff.ru.

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.ru/pify?keyword=attendance+allowance+app+form
    • http://sesim.glennmehrbach.com/uploads/1/3/0/8/130874276/totojafufasizorusizu.pdf
    • http://xusotu.allsaintssidley.com/uploads/1/3/0/9/130969577/8465284.pdf
    • http://files.fultonfalcons.com/uploads/1/3/0/7/130739081/9396958.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/african_women_names.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/wumolezizavijitupux.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/pengertian_belimbing_wuluh.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/energy_converters_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/medical_treatment_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/putogevolida.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/xomirulawujiradikesi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/classification_of_matter_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2500/4706/files/avg_internet_security_2016_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/26159854790.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/calculus_a_complete_course_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3167/4535/files/wobefefuzoginiko.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_off0000681e.bin
6cbd74224924659fe352b552f4bebf28a402f1457d1b3266caf379401f99bb1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 5204 bytes
font_01_sfnt_off000079ce.bin
b4fe5b36a73865d9b2ab2fe96e641afe2138d70b9cd6c8d43066dbfbe44de44e
pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 9896 bytes