Malicious PDF — malware analysis report

Static analysis result for SHA-256 8918b2e1ba736d4a…

MALICIOUS

PDF

56.3 KB Created: 2020-08-17 06:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9887277b01124041531dbd1a3037f5b6 SHA-1: a880a7fb8125b933d9351936e3959b9610bc63aa SHA-256: 8918b2e1ba736d4a34b17534715477341214f576dbe3a718053cb25adb64c35b
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a link farm, indicating an attempt to lure users to malicious infrastructure. The presence of a 'download button' heuristic further supports this. The primary malicious URL identified is https://ttraff.cc/pify?keyword=arihant+computer+awareness+book+pdf+free, which is likely used to redirect users to a compromised site or a phishing page.

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/pify?keyword=arihant+computer+awareness+book+pdf+free
    • http://files.olasazulescostarica.com/uploads/1/3/1/3/131378915/lomet_riduzedi.pdf
    • http://files.herbfire.com/uploads/1/3/2/6/132695575/4314310.pdf
    • http://files.jmbensikdesign.com/uploads/1/3/1/8/131856232/4cd8fd6.pdf
    • http://files.herbfire.com/uploads/1/3/2/6/1326955
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/65067706846.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/list_of_assets_and_liabilities.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/porapizelibepufatodinin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4313/files/whatsapp_gold_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/demite.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5607/files/kitugegoxurerokexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/calendrio_perptuo.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_off00006dd6.bin
a6b379af023de36f882d5e71661f1fb9e69857ca758db5874236ea7fe6e86455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD6 5648 bytes
font_01_sfnt_off000080d4.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D4 2116 bytes
font_02_sfnt_off00008aa0.bin
091b3971598bc76889deeb0f445d9c82f997322c21c21a8a90d9e89bbaf12957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA0 14728 bytes
font_03_sfnt_off0000b838.bin
73b974129f72fcf9196afb5cef55bcf25245455c74e72e6933e11155d77994c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB838 8120 bytes

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