Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc42060046205df…

MALICIOUS

PDF

37.1 KB Created: 2020-09-03 02:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c164d4c8283ad44349f28109d2e321be SHA-1: f66bccd94eb1393e4200c5bc42b8465650ba8c84 SHA-256: 7bc42060046205df85e186d6b87aaeca17ad6173c7ae217a2e3273e1f71d6261
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple critical heuristics as malicious, specifically for containing a link to a known malicious redirector infrastructure. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/wix?keyword=golden+wind+ost+piano+sheet+music, which likely serves as a gateway to further malicious content or phishing attempts.

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/wix?keyword=golden+wind+ost+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/17109508344.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/bevevetebokejiredimosure.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/sociological_approach_literary_criticism.pdf
    • https://cdn.shopify.com/s/files/1/0435/8147/2929/files/84103319909.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/61986687754.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/ferutawanorekagem.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/59961891621.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/maposubawiwixukegijabife.pdf
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/53274068522.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/belarus_visa_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4665/files/analytic_geometry_circle.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/mariadb_tutorial_for_beginners.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046ed.bin
ae5a60f025735e5b1141edb5cd5ad6dabe83fa807dbba5d445392e31f1ae0798
pdf-font-stream PDF embedded font (sfnt) at offset 0x46ED 5340 bytes
font_01_sfnt_off00005906.bin
71a27738b983ec7d49ffcee8077032ee037ff3b66c86d3b9ee6ae9eb3e277109
pdf-font-stream PDF embedded font (sfnt) at offset 0x5906 14308 bytes