Malicious PDF — malware analysis report

Static analysis result for SHA-256 2696a32b0cb6f240…

MALICIOUS

PDF

48.6 KB Created: 2020-08-31 01:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37146686f9981422d8c16e6c434643e SHA-1: e8ba53c4b16f8d92f0696ea0a87a88a97d554637 SHA-256: 2696a32b0cb6f240defa03e61c1df7d9bba5f4ab0e6ffd8a48fabc8e5a31be05
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=surface+area+of+right+cone'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=surface+area+of+right+cone
    • https://static.usrfiles.com/ugd/b8c837_09afb7bc9c834125bc5547bdd4df0aea.pdf
    • https://static.usrfiles.com/ugd/d01287_defaa96204924fb0afc8b680f26bc535.pdf
    • https://static.usrfiles.com/ugd/db1da1_0e4ad60dfbce46b2b15feecc6214b9dc.pdf
    • https://static.usrfiles.com/ugd/735189_9eebd94c647b4e3fb30b548fcf745c8c.pdf
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/10836697596.pdf
    • https://static.usrfiles.com/ugd/469aea_ba021f546cb14a2bbbb737e2749af78e.pdf
    • https://static.usrfiles.com/ugd/03ae60_a025cd8856bb48bcb5ce859b0dc50ec0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea18c6f43d984f198b1cf0c001dc39e2.pdf
    • https://static.usrfiles.com/ugd/a18aa6_1647dbb190bf4f638724c9cb0fc39861.pdf
    • https://static.usrfiles.com/ugd/a58b01_9b4ef4d6cbe84a34ad2945a627198def.pdf
    • https://static.usrfiles.com/ugd/9ea91e_36189a60c400422eb6692a22e3d5741a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bda96b91e62445049cbdeb2cb1c3580d.pdf
    • https://static.usrfiles.com/ugd/4dd980_e2433ad32f8a4c2f871df139d375477b.pdf
    • https://static.usrfiles.com/ugd/0aab01_84bb08b89b334729a9c09bbd03aca3c2.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_off00005d15.bin
1d66d610a778a247ee3f6a6f57b82d231ef105dc8aa940e431e466d736006831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D15 4916 bytes
font_01_sfnt_off00006dba.bin
de9e7691d74059575987efef31ca9bd089153c07c0b50983d8d229fdb99d321b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 10716 bytes
font_02_sfnt_off00009269.bin
9dd161ad083bde31f1785977080a21cd00ffd1d65af7312c0685ba069ea0c2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9269 16152 bytes
font_03_sfnt_off0000a76f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA76F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.