Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf210d9552c7bcf…

MALICIOUS

PDF

52.5 KB Created: 2020-08-30 17:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0371e427de2d52e5c825cca39ce2be SHA-1: ae32eb750b4b3e9534353a503ab3f0a35b025ea3 SHA-256: 3cf210d9552c7bcfc874f517d0e0882f3b175a1a513cd8c1e04b8d6aa25cd4c6
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to embedded links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=poirot+theme+tune+piano. The document body contains garbled text but includes the same URL, suggesting it is the intended lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious PDF.

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/wix?keyword=poirot+theme+tune+piano
    • https://cdn.shopify.com/s/files/1/0438/5836/2528/files/sample_fax_cover_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/58041495128.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/wopurenetese.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/syndicat_national_des_brasseurs_indpendants.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4f2d3a8e00f4a29adb9ef6f804fe0dd.pdf
    • https://static.usrfiles.com/ugd/299074_2347c8dbc7eb4c3bbc90335ce23d765a.pdf
    • https://static.usrfiles.com/ugd/299074_e20a619d1cbc4b4cb1d40cdb39a2a151.pdf
    • https://static.usrfiles.com/ugd/89363e_f28d511863ba42369415ae88a79a2395.pdf
    • https://static.usrfiles.com/ugd/4d400c_82d538f8c171495bb09aa8d7ec6a3e60.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/94599242142.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/54591776944.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/a_case_study_of_internet_game_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/41657828692.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e2d96e8b664eca90f671195c5a7cb4.pdf
    • https://static.usrfiles.com/ugd/ace02d_10545f3e4e644614b2a889675b2bcc1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_fefe531d7f564c27b32e55273aa86ebf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d9f.bin
c3dd73a9ab25b98bb046f38c7743eca390e13cefab38735619906ebfc3f297ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9F 4540 bytes
font_01_sfnt_off00008d5b.bin
d1f1629c486109a0b64b76082a0d37f2e2d37b3d5107a4a4984ef3f13c1ac69e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5B 4848 bytes
font_02_sfnt_off00009dac.bin
fa155d453f38fc40b4738eb27cbeea7bf581f688eb9a3f02b81f1b0dd2126711
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAC 11648 bytes