Malicious PDF — malware analysis report

Static analysis result for SHA-256 431264d08abfa9c4…

MALICIOUS

PDF

54.0 KB Created: 2020-09-01 03:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66401108fb6743945bd62796cc3f8972 SHA-1: b72e77fcfda1ec4d0b3779e776f1cf667f6d8a2e SHA-256: 431264d08abfa9c4b2387e77f463280e85a205013bed141a88f91abab92ec79c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though corrupted, contains a URL that matches the malicious redirector. This indicates the document's primary purpose is to trick the user into visiting a malicious URL, likely for further exploitation or phishing.

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=area+of+irregular+shapes+worksheet+with+answers
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/20431461488.pdf
    • https://cdn.shopify.com/s/files/1/0461/9013/3406/files/email_format_for_wedding_leave.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/kejikiweb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3889/0394/files/electric_guitar_vst_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5556/files/mefunalurerikiliti.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac046756b5645e0902e25a83b11bb75.pdf
    • https://static.usrfiles.com/ugd/d5d855_d6bb6790930549d4896221018160fda5.pdf
    • https://static.usrfiles.com/ugd/c836c3_4920df253e9244f98cf05082717d6dc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_21485fa6f9214a2188425a7cfd558307.pdf
    • https://static.usrfiles.com/ugd/ce14f3_a3e3624c3aa94691971bc6c5f43dae12.pdf
    • https://static.usrfiles.com/ugd/628a76_004ab382d1be4e048032350d6cef081e.pdf
    • https://static.usrfiles.com/ugd/6c032c_405fd81209104748ab0a633b769c8d21.pdf
    • https://static.usrfiles.com/ugd/b8c837_4912825f01514350b65ddd54cb9076a2.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_off00007c4c.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 2828 bytes
font_01_sfnt_off00008646.bin
4875c1b92cb683064105b9e5aec1a6d133f51c7a7f73364913498191dd64c569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 5188 bytes
font_02_sfnt_off000097f6.bin
d4521ad943d9dda8c41f69e985c9136d4bb47fba9bb5722fccef98b1adf93e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F6 9892 bytes
font_03_sfnt_off0000b9ca.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CA 4324 bytes

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