Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be221f82578032a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 18:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f18957d4a1bef360b121ed05f6f328b5 SHA-1: 37af7bea733636235ddb878d45264ebc0089a143 SHA-256: 4be221f82578032a98a9a83a08c9d5a6db4944ecc5db98331f655a161b21281a
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=opening+and+closing+inventory+in+balance+sheet'. This URL is designed to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=opening+and+closing+inventory+in+balance+sheet
    • http://files.apsacgots.org/uploads/1/3/0/8/130814120/savosaxudi_busuwix_pifotufozakew.pdf
    • http://bedim.ohiofuturebasketball.com/uploads/1/3/2/6/132682646/samobeguwaranosirot.pdf
    • http://files.mjloen.com/uploads/1/3/2/3/132303170/ganukama.pdf
    • http://suzuxez.hilburnacademypta.com/uploads/1/3/0/8/130874222/70b6c100.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/fotekesapere.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/underworld_rise_of_the_lycans_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/77211726200.pdf
    • https://cdn.shopify.com/s/files/1/0440/5090/7286/files/kafomamelaren.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/34284639045.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/wuletegajiduso.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/finomuroxerupusa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/zaguruluwibagomevirutove.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/zetirexinixuzibaveg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/71358776358.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_off00005e5c.bin
d30d8d1523ca1d6755fcbffa5f32a6a3b911593ca4de56a0543e016ec4aa277c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5C 5664 bytes
font_01_sfnt_off0000719c.bin
010177a4dd329cbb8f8cdabbc17a5c1b006f3358a711e73b9f002b012a669525
pdf-font-stream PDF embedded font (sfnt) at offset 0x719C 10728 bytes