Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43f29767f7f416e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 22:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8725166e719728f4c1c46a0a2988bae SHA-1: 0d9f262df849056b45c99d8370cbd1ca7d73dc21 SHA-256: c43f29767f7f416e06e6d7beb0cde14cb026b3309d3c5dadc2b0843e274eef73
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a malicious redirector link, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector. The presence of a 'download button' heuristic further supports the lure. The primary malicious IOC is the redirector URL which likely leads to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hansen+econometrics+solution+manual
    • https://static.usrfiles.com/ugd/8cbfce_50287c8670124bb6a62acf3975b02592.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_b478d36adfaa4c39a758d6d30b2f0148.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a0d3bf25dd049388d06aee2dfef8673.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/67184372233.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4010/files/93111947942.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/37411375596.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/legizidupugofogizo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/excel_2016_use_chart_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e5cc5025a64bebbebfacf31c504f08.pdf
    • https://static.usrfiles.com/ugd/5e8de6_67d9abda6bfd47a7b026f1755e770917.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab43829cbacd45159753412fe484545f.pdf
    • https://static.usrfiles.com/ugd/b8c837_98cd7f61adbf4dd3a33e90340b305af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
    • https://static.usrfiles.com/ugd/c1108c_a9c0e3afcb5242dcb4c94353cc35d7ff.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_off00006e53.bin
fac7418f0d1c8a29b3d7ffb560de108dd99974d2e4ccaacbe41ae215eda29a66
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 4788 bytes
font_01_sfnt_off00007e6b.bin
ee7d750f53a0a2ccf9dd55d9dbe6d076e5b670ec51a620e942d584c9f82d7926
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 11052 bytes
font_02_sfnt_off0000a38e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA38E 4324 bytes