Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a864eadba05e0c6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-04 10:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a02cfaa44cf6a06101bc842c809ca74c SHA-1: e98eab6abc3b4af484cbd8b81bdd19699fa996f6 SHA-256: 8a864eadba05e0c6411ded38b3947201c30e8fbfb347a36be1536864dbce1163
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation scheme, evidenced by the high number of embedded external links. The primary malicious link, 'https://ttraff.ru/pify?keyword=types+of+cognitive+biases+pdf', is flagged as a malicious redirector. While the document body contains text related to cognitive biases, the overall structure and link distribution suggest a malicious intent to lure users to potentially harmful sites or to artificially inflate search engine rankings for the linked content.

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=types+of+cognitive+biases+pdf
    • http://files.suitedreams.com/uploads/1/3/0/9/130969761/885419ab6ae9a.pdf
    • http://files.hiddentreasureboxers.com/uploads/1/3/1/4/131408954/nikunanefo_jumujebute_kevarazemaf_wolus.pdf
    • http://files.mason4kauai.org/uploads/1/3/1/3/131380845/zogagunakefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/9661735938.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/sowugezuxodow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/vasosexedosilonexer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/count_number_of_files_in_directory.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/sipepojalotepurumiwunad.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/weraloxejizidareler.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8658/files/vudorazoguvoreregobemef.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/10443171473.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/29212855842.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/jovufagoxemeba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/rudatezimeboxamenowim.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_off000072c5.bin
8b4d7c7ba15aef1b0b3b124be3fd4c0cabf57fbaa4971f3a0ecbfc3bd15d5fd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 5448 bytes
font_01_sfnt_off00008569.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x8569 1800 bytes
font_02_sfnt_off00008df6.bin
efcd2269991090073b5d9ef098cb9c0e5e8bf715fa5a5693610e81633460217d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF6 10432 bytes