Malicious PDF — malware analysis report

Static analysis result for SHA-256 17216eb123baf2cb…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 12:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aecd24da31d0116c194b66aae9e17733 SHA-1: 2df44fdc20c6ed519857af5e19efd86f920bbcdf SHA-256: 17216eb123baf2cb7874a50bfa4d14610b84ff625ad3cc3d10b393dbc1c22df5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.cc'. The document body also contains a call-to-action phrase and the same redirector URL, suggesting a phishing or scam attempt. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.cc/wix?keyword=clickcharts+descarga+libre
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2fb875fa3d1c47099af43c8358cca095.pdf
    • https://static.usrfiles.com/ugd/b8c837_09b20c05809e4cb18bddd7037932ee2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da5ebc1360471ab55a8ca19d7e0308.pdf
    • https://static.usrfiles.com/ugd/b8c837_92b238685ffe4f349a7145b17cc66dab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea06ee8763242819b6ad57a77c297b8.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/sbi_anywhere_app_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/65741837367.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/pixir.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/j_allen_chassis.pdf
    • https://static.usrfiles.com/ugd/b8c837_a980c927bb7c4daf95d55fc2b391a09a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c6863ba88144bb3a23b51bf74ff5727.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ddab2ec31584d88b077cba969f071b2.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da3.bin
1d33507509a48779d0391d798d0445e8bf53ed44056a539d0f98b885262c133c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 5308 bytes
font_01_sfnt_off00006f96.bin
24dd093c1fe4d8066343fabd960ead63c8fd755b573410454597a8e016256fa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F96 10192 bytes