Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a3d668b65004bc…

MALICIOUS

PDF

48.3 KB Created: 2020-09-02 10:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e743f1055eb625cd454d9ad6f5869800 SHA-1: 3511934af9c59e614631ce481b124a926f152763 SHA-256: c5a3d668b65004bca72d636ad9562caf4936fec3c41002049572946615f45079
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'personal biography template pdf' which redirects to a known malicious domain, ttraff.com. This indicates a phishing or redirection attack. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection behavior. The document body itself is heavily obfuscated and appears to be largely binary data, but the embedded URL is clearly visible and actionable.

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.com/wix?keyword=personal+biography+template+pdf
    • https://static.usrfiles.com/ugd/3aca14_cd80c8d1571841dd9dc6b6c64c4e4983.pdf
    • https://static.usrfiles.com/ugd/7ff653_39e7d174cdee4e359343cb7b6472f022.pdf
    • https://static.usrfiles.com/ugd/78c764_4cc0b440884a45848835c0c3187be643.pdf
    • https://static.usrfiles.com/ugd/cfa91a_b8323fdda1784f3c9f8c598bff36c5de.pdf
    • https://static.usrfiles.com/ugd/a31856_addf721be54a401d82c8b6b150d1e7a1.pdf
    • https://static.usrfiles.com/ugd/cf79db_b37fbf482fdc4d40b722298ba0287da9.pdf
    • https://static.usrfiles.com/ugd/9d66c7_a623744dd6f64789947fc3f60aa50b39.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/bash_for_loop_range.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/nokawijufevatojovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/14873522687.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/97359179289.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/android_vs_ios_sales_2019.pdf
    • https://cdn.shopify.com/s/files/1/0463/5443/2161/files/82823374277.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_off00007da8.bin
4754552e51a463bebb2bf659db55eca2b6ce5210f4c9bfe59393a42c3b8f1cfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA8 5700 bytes
font_01_sfnt_off000090e4.bin
0d045e3b2d9a2bc14c72ee6df512cc0afa43eb36ee4538eab2bbb073e67aaad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 10364 bytes