Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b08f7cb23ecd1f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 09:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1ea5b27f089540f8360bf14ea89799 SHA-1: b11a19ccdabd6d632df8d06d388d70da2ef17d32 SHA-256: 94b08f7cb23ecd1f98d69d1bce3e3ce36b679996fad5efdbef6a704174d6d6af
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily corrupted, contains text related to a study guide and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to distribute content or redirect users.

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=barron%2527s+sat+subject+test+chemistry+13th+edition+pdf+free+download
    • https://static.usrfiles.com/ugd/b8c837_0f2e7d3253054d34973e530f3a96ea4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_344417b15c694c8ab78c02c761c291cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4e3ef6c714e46d79401bf9f7593084a.pdf
    • https://static.usrfiles.com/ugd/b8c837_108fc8ab29a64a10a410ea0c5d2b291a.pdf
    • https://static.usrfiles.com/ugd/b8c837_00d660db7dc74301b8966681077a6c88.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4a5d3b94b0c4a18aa2693b900cc7b9a.pdf
    • https://cdn.shopify.com/s/files/1/0438/2733/1232/files/bosoxebidafunuf.pdf
    • https://cdn.shopify.com/s/files/1/0466/7952/3493/files/17789770635.pdf
    • https://cdn.shopify.com/s/files/1/0449/0382/5575/files/siwomimukopama.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/99002981772.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/what_does_vlc_stand_for.pdf
    • https://cdn.shopify.com/s/files/1/0457/0824/7196/files/ignou_bshf_101_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/1422860437.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/76339870093.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0693/files/27836399857.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2e.bin
bbbfa4cef2af7c203856d196265e397e893ba24c542538b315a5fe1e05f0866d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2E 5988 bytes
font_01_sfnt_off00006283.bin
5d08c7c9ed748df0f5fb927c3804ee92d2df0b452e91f95cd86adca715a4baed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 10412 bytes
font_02_sfnt_off0000859b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x859B 4324 bytes