Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7d6209d6f8970a…

MALICIOUS

PDF

66.2 KB Created: 2020-08-30 05:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a734e74edf53994cd1e515ba7ef6a240 SHA-1: 934f74b1fc97332ef02f929757fee8d6a7b7b4a5 SHA-256: 1c7d6209d6f8970a8fb372ff09355200ad35f1cdcfc45b7bfaca477cb81044d3
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wix?keyword=destro+lock+leveling+guide
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/sewiratiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/keogh_report_urgent_care.pdf
    • https://cdn.shopify.com/s/files/1/0460/1561/1039/files/zepoxilananeweluzave.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/41597698605.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/web_xml_3._1.pdf
    • https://static.usrfiles.com/ugd/565485_bfc9f208c1a64289836ab51b9d80bbe7.pdf
    • https://static.usrfiles.com/ugd/b42fd6_48acc53f24114d9aa1a2af398454a3cc.pdf
    • https://static.usrfiles.com/ugd/3b47cb_8b9017a3a72f4efa85144a04357f92bb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/shellhwdetection_shell_hardware_detection.pdf
    • https://cdn.shopify.com/s/files/1/0438/0665/4626/files/tulizabise.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/caller_id_phone_book_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/xoreletemiliramukobovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/wasefedesukigenuza.pdf
    • https://static.usrfiles.com/ugd/61b8bf_b020244e5e7647a69983659ada5a462d.pdf
    • https://static.usrfiles.com/ugd/8cbfce_99a2ae9e64c1435ea2acf7ed110faaef.pdf
    • https://static.usrfiles.com/ugd/73f3b0_ea7cc85e58cb4962bae76a6931b66843.pdf
    • https://static.usrfiles.com/ugd/b8c837_43c840659fd2480593c52aa8e440cea8.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa7b1e0f07fe4643adc12cdd748febc5.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://static.usrfiles.com/ugd/b42fd6_48acc53f24114

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b9.bin
e334b8b769aae982c9ee8bd26492a6ae7cd4176dde13731b00ea5f91c03f3691
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 5020 bytes
font_01_sfnt_off0000d8e9.bin
b9882bb1358771ed1e26d1abceea7f5bb608f14a1b7706947240bd8fb7e99611
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 10192 bytes