Malicious PDF — malware analysis report

Static analysis result for SHA-256 537d4cc9d9a62085…

MALICIOUS

PDF

42.9 KB Created: 2020-09-09 11:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8973f7f4c7b0b51b16652aafd3481e9 SHA-1: 0ff220634ba55b1bf8f9f4c9eb89875e47fb7c3b SHA-256: 537d4cc9d9a62085df4068eae60eb0f35ad07c81454def2423129ada81d5a057
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link points to 'ttraff.me' and is designed to lure users into downloading software. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results 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.me/wix?keyword=java+jdk+7++64+bit+filehippo
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/wii_u_title_keys_usb_helper.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4337/files/android_app_store_developer_login.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/wawifavafe.pdf
    • https://static.usrfiles.com/ugd/b8c837_73dceebe9ee54879ac76d85f708e66c0.pdf
    • https://static.usrfiles.com/ugd/681527_eabb2bb051174a749034906a2077eab2.pdf
    • https://static.usrfiles.com/ugd/1df9ea_06605d81e2c24fd59009fcc722037bf3.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/lantern_making_competition_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/8877/1227/files/51693724226.pdf
    • https://cdn.shopify.com/s/files/1/0441/3338/4344/files/balearia_ibiza_formentera.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/34400038418.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/ansi_c80_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/microsoft_word_bookmark_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/9956/8795/files/24716184167.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/tosimuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/89028569560.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_off00006893.bin
b92874f5bfd747ec6790df985ac3aa8ef5a79677512c2679f89fd83b342c6b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6893 5504 bytes
font_01_sfnt_off00007b6c.bin
458522a8b5b657678f3666f72d1361f05b8bb6e0a012afdfb76780174e8d29e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 10296 bytes

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