Malicious PDF — malware analysis report

Static analysis result for SHA-256 439faa60c5a0d868…

MALICIOUS

PDF

36.1 KB Created: 2020-08-30 08:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed078df40a2ae0b4d6d038579d2ac13 SHA-1: 67f43b8ac761b454ead4c0bae5554a3428280729 SHA-256: 439faa60c5a0d868aa823aec6e1ebbfcddf543a5e38ad7e1a6d472ce35b8793c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a solutions manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, many hosted on Shopify, likely to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.cc/wix?keyword=mcquarrie+statistical+mechanics+solutions+manual+pdf, which redirects to other content.

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.cc/wix?keyword=mcquarrie+statistical+mechanics+solutions+manual+pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/18647102495.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/42472611406.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/86691449427.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/13866114848.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/runescape_summoning_calc.pdf
    • https://static.usrfiles.com/ugd/253000_739c7cc0190a4a549844dcbd073fb6e6.pdf
    • https://static.usrfiles.com/ugd/6846fe_3db43bb9ac7b4cce8220b0c1c4909241.pdf
    • https://static.usrfiles.com/ugd/269bb8_2f076f7a76484eecabfa820fdbe7357b.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/dudigitatewogoremefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/bowivota.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://static.usrfiles.com/ugd/cac9e4_19fc1525599f4cc0ab11c906d3dffd2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_34b50b827e3f437b9d9bbf6ab7b54bb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cda37eaa1d2243e7ad204dc883723ec4.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_off00004404.bin
c97861d2a304fa8b214a9124f709f42cfb53e68251c6192a519310bba67ef1ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x4404 5408 bytes
font_01_sfnt_off0000563f.bin
ac0c12ae868b6322fba89a300ef1ee1b5a821e824a1edfbc3e68172711bb8013
pdf-font-stream PDF embedded font (sfnt) at offset 0x563F 9036 bytes
font_02_sfnt_off0000750f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 4324 bytes