Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ef4b145440f91a…

MALICIOUS

PDF

66.2 KB Created: 2020-08-03 06:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54cc276a28a45f322ac3fc4e8ee99a64 SHA-1: 75e58c938abb252d424cff77f5f0e6263bb5297b SHA-256: d7ef4b145440f91aa2ac4082c936b383e4dcc6b8f6a31e3e976fee6c28822284
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wb?keyword=mahendra%20guru%202018%20video%20pdfs`. This URL is likely used to redirect the user to a malicious site. The document body also contains this URL, reinforcing its role as a lure. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains, likely for SEO manipulation or to host further malicious content.

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/wb?keyword=mahendra%20guru%202018%20video%20pdfs
    • http://files.fortheloveofallthingsitalian.com/uploads/1/3/0/7/130775751/liwake.pdf
    • http://files.avsyum.com/uploads/1/3/1/3/131398084/worezovi.pdf
    • http://files.flyrgfa.com/uploads/1/3/1/8/131856725/lekoripewijikegiw.pdf
    • http://files.digitall.photography/uploads/1/3/0/9/130969755/05a6a377e6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/3522868965.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/secretary_of_state_ct_concord.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4600/files/59568460248.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/25659541792.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/97247841775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/semigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/convert_string_to_lowercase_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/hidden_object_games_no_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/34181714609.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/99290522948.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/revajububuzewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/daradibutowilarovuzudam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/36694602209.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008926.bin
c41a8c31fdc685cb3cccb516dd834d2c5047283269f947f2e6249f7c84dbda28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8926 5856 bytes
font_01_sfnt_off00009d25.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D25 3720 bytes
font_02_sfnt_off0000a888.bin
e8f28d7dba08eab1f6643eb336200f89c04b369835875fa9d8722435e4b2c2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA888 12540 bytes
font_03_sfnt_off0000d0d0.bin
2001191c8a23729212f3f172336d14d6762179373aecd10536104ac9f75b6258		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D0 14432 bytes

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