Malicious PDF — malware analysis report

Static analysis result for SHA-256 497402fce4f35a50…

MALICIOUS

PDF

42.7 KB Created: 2020-08-29 19:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9281e710db334d37622d06764c26f41e SHA-1: a0dfdd3a4bb4f8f07254b7f9f2e371673dd88de1 SHA-256: 497402fce4f35a50a72024973f8a2723db616dd2be2cb5bc09396a915b642390
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=internetsiz+mp3+indir'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are benign. The presence of a 'download button' heuristic suggests a social engineering lure. No scripts were extracted from this sample, but the combination of the malicious redirector and the download lure strongly indicates an attempt to lead the user to 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=internetsiz+mp3+indir
    • https://cdn.shopify.com/s/files/1/0452/5296/8609/files/free_eguide_guitar_music_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/10590689770.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/rei_camping_checklist.pdf
    • https://static.usrfiles.com/ugd/b8c837_07d49d4fb06744a1883f067bfe3d891b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0394808d7bf8439389b815fea504f58a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jimun.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/10528314493.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/nevosiwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/1891/7787/files/18827179710.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/27836367811.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_off00005cb8.bin
8c279def9e99f3a4e1e8fe8dcbfecbbbb7c479882cf7aad8d2f1cb0c70f21abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 4692 bytes
font_01_sfnt_off00006c85.bin
d5e13c8044138e38772a72df233a5c77c3bacbff516d40520f25f5f2e2f71969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 10548 bytes
font_02_sfnt_off0000906a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906A 4324 bytes

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