Malicious PDF — malware analysis report

Static analysis result for SHA-256 80edabf1ca77d9b4…

MALICIOUS

PDF

44.4 KB Created: 2020-09-03 14:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 274cf94ddc512acdc9ad3077ba9eaffa SHA-1: 220c3defb089d2339702d5d0ccd07e498672cd8c SHA-256: 80edabf1ca77d9b4603ad82c17020ec629bd3b14cd1c749e3ac31ad7aa6f6ba6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=fundraising+thermometer+template+excel', is designed to lead users to malicious infrastructure. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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=fundraising+thermometer+template+excel
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/71842897707.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/wefopefijof.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/cells_alive_webquest_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/47883401166.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/telugu_andhra_jyothi_news_paper_today.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_0a83b31830c04b658b7014cbef58b145.pdf
    • https://static.usrfiles.com/ugd/2c7c49_2b81d7eac7054b42af00b5a4dc82769e.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_057887e0e12b4b93ab1b9258b261790b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2069fcc385d483c8417b5d2b6ac7d3a.pdf
    • https://static.usrfiles.com/ugd/dc6899_7c66f3a545304f54b801884bd7b90b47.pdf
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/present_perfect_tenses_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/jasekojekeza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/44005337569.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/fojatoditaxesuwubej.pdf
    • https://static.usrfiles.com/ugd/599f1c_c0fa3b2463084c84831d602f2577166e.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_9372d3ef782141cf86eab6c6df045b16.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_off00006e93.bin
9ccf01f24525f8d6a08b8673f6744935cadd5012217669a57a80e2e3daeb4b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 5508 bytes
font_01_sfnt_off0000812e.bin
3dd03c4beb4a22ab51ad63acc541c5ad1db443490e970ec74d9e733c7374be04
pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 10276 bytes