Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab52ae9cfe63dfd…

MALICIOUS

PDF

46.2 KB Created: 2020-09-03 16:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032ea4da162dfca27e2ec06139aec35e SHA-1: d1d1607abfaf56d68649292faf7edc20b82dee0f SHA-256: 2ab52ae9cfe63dfda2e842f2dfc84c2eafd41258404adf605a3c01f795ac2da5
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=book+store+blogger+template'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and references to 'book store blogger template', suggesting a lure to a malicious site.

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.me/wix?keyword=book+store+blogger+template
    • https://static.usrfiles.com/ugd/97634b_6a99c93b0cb24e5582a665067d68ab23.pdf
    • https://static.usrfiles.com/ugd/b8c837_311d9ff710d54d5ea14d805a016b4f54.pdf
    • https://static.usrfiles.com/ugd/03ae60_b25d8d31ea2f45fe95f2be48847a2927.pdf
    • https://static.usrfiles.com/ugd/f80014_d2b8aacbcccd4b7483bfa0a5cee4bdd2.pdf
    • https://static.usrfiles.com/ugd/6f9b04_f9e70b307544448dba17680a999d5189.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/2749565254.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/dedatineripofeponut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/50340061773.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/beporir.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/rexonopatalov.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/adecco_thailand_salary_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/gotuxizubumonejinan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/79683201495.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/39285993581.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5979/files/manual_para_aprender_ingles_basico.pdf
    • https://static.usrfiles.com/ugd/4725f1_4e05df8066b245228dc22b3f15b6da29.pdf
    • https://static.usrfiles.com/ugd/ee6770_32d39455d35d4d52acea4e1d38295e30.pdf
    • https://static.usrfiles.com/ugd/e5412a_f128fb6d0ac14ee589b1fc65c789ad92.pdf
    • https://static.usrfiles.com/ugd/5e81b9_1bba36e655b2427a97bf3b3ad7782cc4.pdf
    • https://static.usrfiles.com/ugd/cece23_e0d0c89fa393475d9fd63206fa54ac8e.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_off00007551.bin
efe4a14b8766cebef14f6ec9fbcb7af2afc8034aa17ba4027ecbf307d7f6d36b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 5392 bytes
font_01_sfnt_off0000878f.bin
438b88cbc29e29c95ab3c7dabe05f688c3b8d02c85c0185b3f573608af05d933
pdf-font-stream PDF embedded font (sfnt) at offset 0x878F 10536 bytes