Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d690f3bdef50db…

MALICIOUS

PDF

47.5 KB Created: 2020-08-09 20:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb103c71aa3c674707e52e102be8f768 SHA-1: 5a153fb40cbde7e923bc0f9af559eee73b6f2a70 SHA-256: 30d690f3bdef50db6f21200b801256fa87976ce0db4e845a6b8c3712c08150a3
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=gest%25C3%25A3o+financeira+pessoal+pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to financial management and the URLs, suggesting a lure to trick users into visiting potentially harmful sites.

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=gest%25C3%25A3o+financeira+pessoal+pdf
    • http://ferexek.darbsterdog.com/uploads/1/3/1/6/131607062/7986923.pdf
    • http://tijowo.pdxprays.com/uploads/1/3/1/0/131070993/9ddae7dbed382b8.pdf
    • http://files.drgrahambooks.com/uploads/1/3/0/7/130740180/mejupasomegup_narusomafi.pdf
    • http://files.maitlandstreetrodders.com/uploads/1/3/1/4/131437017/nufigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/lixatisekabu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/35557624740.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/1519859487.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/93703456327.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/sufugutenatezemoxowemajuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/wonafodapufumut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/sumotafugovovajidifiviva.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/fogupofiferixinupegafogap.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/risk_matrix_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/65437812432.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/najotumonolovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/west_states_and_capitals.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/organic_chemistry_6th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/43603034081.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/tukamimunukisuliribal.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_off00007690.bin
5fd73a1f7ae83a8e74c0a2fc094a1ad5f84f4f5ff63d8942b6f55113f83b39d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7690 5496 bytes
font_01_sfnt_off000088be.bin
f334aa72880caf41413ea2306c2429132af4975f71c0ee69a95d7771d22f2f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x88BE 12716 bytes