Malicious PDF — malware analysis report

Static analysis result for SHA-256 d792e326c93e78e7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-24 00:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687256538b1e48a6ad136c353d0958c1 SHA-1: 570f63359be0c611c4c52d288604fad4a42adf59 SHA-256: d792e326c93e78e7414bbeeaefb5f3a9fca2d69777f05d2ffff37190d2aa60c6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=analysing+data+worksheet'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0436/4645/1862/files/jixomosuvugusazesuzoziti.pdf'. The document body, though heavily obfuscated, contains the text 'Analysing data worksheet', likely intended as a lure.

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/pify?keyword=analysing+data+worksheet
    • http://guwenagog.belsondesign.com.au/uploads/1/3/1/4/131407406/8815960.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/jixomosuvugusazesuzoziti.pdf
    • https://cdn.shopify.com/s/files/1/0465/9501/4821/files/sasktel_email_setup_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0093/files/wufetum.pdf
    • https://cdn.shopify.com/s/files/1/0462/6540/1495/files/26552396200.pdf
    • https://cdn.shopify.com/s/files/1/0439/9398/9278/files/77473179839.pdf
    • https://cdn.shopify.com/s/files/1/0438/5469/2512/files/donulokuwefabaxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/45809057039.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/2005_volvo_s40_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/xopoveve.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/30978603852.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/tefuvopuwopovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/tv_guide_itv_1_plus_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/printable_calendar_sept_2020.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_off000068d6.bin
a2f3dd4ee87c956af33fddd9beb356f70be12c12166f2cb6e2e0a1279be655bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5336 bytes
font_01_sfnt_off00007b04.bin
d8a52b3ab872ba6e3f4ebb2e62c02662e078f93918c365c88ee227acb7a4adf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 10520 bytes

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