Malicious PDF — malware analysis report

Static analysis result for SHA-256 39340fcaafd2f0b2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 15:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8981691b441ee89ed724906f8aef4c6f SHA-1: 253552ab9a8658ec3f72f24a1ac122acc9807eb7 SHA-256: 39340fcaafd2f0b2c72dc6015557a535c2b0699631c4c9c72e3960a5bd50a29e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=que+es+el+contexto+geografico+pdf'. Another critical heuristic identifies this as a PDF link farm, with numerous links to domains like cdn.shopify.com and other file-hosting sites. The document body itself contains garbled text but also includes the same URLs found in the heuristics, reinforcing the link farm and redirection attack pattern.

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=que+es+el+contexto+geografico+pdf
    • http://files.idesigncity.us/uploads/1/3/0/9/130968926/zesufureriduj-demebape.pdf
    • http://poladul.tommcdonald.us/uploads/1/3/0/9/130969060/b8960181c113b9f.pdf
    • http://wiximu.projectechelonracing.com/uploads/1/3/1/6/131607062/bupebasisugu-jalumekiwo-piputa.pdf
    • http://files.betinamarcolin.com/uploads/1/3/0/8/130814229/zidalapizeda-bupevojebavuki-jumolesubew.pdf
    • http://files.tomasosinski.com/uploads/1/3/1/4/131437246/80a374c93.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/didusazazowoxamok.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/50908900109.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5219/files/fresno_police_scanner.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/velomeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/mobo_market_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/wasosezujowodododi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/mongodb_create_user.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/wupajasexowezadil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/54726075793.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/18423050379.pdf
    • https://cdn.shopify.com/s/files/1/0433/0402/6280/files/lefogemulabasinetilivopem.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/bronchial_artery_embolization.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_off00006577.bin
2c363739aca3293e8eba5704964703a1e92244a913e1493ffc9a74ed82cae953
pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5452 bytes
font_01_sfnt_off00007818.bin
f6d28cb8f5105f415fdc52e70c1886c9616ae0f8afb8fd0ed782a3107e9b0fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 10912 bytes