Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34fb15664a15978…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 22:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ac3635f23619c2dc419ff56e8e3446 SHA-1: 58bf8f631ab9d7c9747f856cd2f35969c3dd6945 SHA-256: d34fb15664a159786c8304e4c4b6d6af5626d4b831958d576f87d9c0765d2d3e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.link/wix?keyword=form_authenticity_token+rails+api' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to Shopify domains, suggesting a coordinated effort to distribute content through a link farm. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=form_authenticity_token+rails+api
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/wuleporakije.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/o_alienista_livro_caleb_carr.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/number_line_1-_100.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/23350378542.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/takukojujujojedarato.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ad87bbb5ac45b1b7a6d1efa8027d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_3279adcd308141108f647b98d0b30610.pdf
    • https://static.usrfiles.com/ugd/628a76_781eb0d47eb943cb923edba7903490ca.pdf
    • https://static.usrfiles.com/ugd/ea78e0_97f8160268ea45ce8481f3cb739ba273.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/97120416413.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/voltage_regulator_ic_7812.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/cyber_forensic_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/message_man_english_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/dakelalas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/xidujipon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/tobizukimuzovemufamom.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/
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/cyber_forensi

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3d.bin
f68faf29a71a3b214f64e87185e0c1220ae910948ffba52ea9d8c9405c5f0b82
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 5208 bytes
font_01_sfnt_off00006eda.bin
212d1c2d3790244d60237d3e054723925a489112a70e09c9acbb423084a25a26
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 14684 bytes
font_02_sfnt_off00009ce8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE8 4324 bytes