Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1622e140bc41b3c…

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 14:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df92e1c8774aaf818f403f2bf6a1e00d SHA-1: 93609540038aa56f74318577c6b610a464e2be2e SHA-256: a1622e140bc41b3c893d3921c3ef9d3188fff2501b54f16703e816e1d301f20d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=payeer+wallet+apk', which is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to drive traffic to external sites. The ML classifier strongly indicates maliciousness, and the overall structure points towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=payeer+wallet+apk
    • https://static.usrfiles.com/ugd/2c8d66_97399763cb63447c8626b93747417b22.pdf
    • https://static.usrfiles.com/ugd/b8c837_854d07ea873f45c381e7c44f16111951.pdf
    • https://static.usrfiles.com/ugd/eaf48f_d7887766b5a34ae5b8f9e48d89409130.pdf
    • https://static.usrfiles.com/ugd/b8c837_e60d38d172564e7582d1c6a0d27d4e02.pdf
    • https://static.usrfiles.com/ugd/43d598_1a4d5e394dae43eba953ffdb0b7c7970.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/gegijasezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/pumeripuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/63333946001.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/zalixozirenazerefagakekam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/85062432720.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/mahindra_tractor_spare_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/sakakuvegatibikanafuwav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/algorithm_design_manual_free.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_9963a4ea3fa449fc8638399d7f940975.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_15de06bb513445229cc05aab905ccd96.pdf
    • https://static.usrfiles.com/ugd/5e8de6_170dcf04177a407bbde034048dac1d2b.pdf
    • https://static.usrfiles.com/ugd/544c7e_af69f70184c54c0e9f95a81b2ee14874.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_off00005c09.bin
35e88e1ceb0ebb67e26a865323ddff7817ecfd6b7b8030262817b696fd7a3f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C09 4892 bytes
font_01_sfnt_off00006cd8.bin
5db8e08d82b22b7b813673e88a5e880f30fd1a8b885a6d555692219e477e9d36
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD8 10788 bytes