Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4f95be430df057…

MALICIOUS

PDF

42.5 KB Created: 2020-09-05 00:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c57234664f1625250c8bf59f3ee8cb6 SHA-1: 29c6d76e81ad92aa8447d13e6c490577116f4591 SHA-256: bc4f95be430df0572c6bbffba5808a1ee923ebdd1133ef7f55d013f48f6c67aa
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/wix?keyword=8th+grade+math+worksheets+to+print'. This suggests a phishing or scam attempt disguised as educational material. The document body, though heavily obfuscated, also contains the same malicious URL and a benign-looking URL from Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=8th+grade+math+worksheets+to+print
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/74703559888.pdf
    • https://cdn.shopify.com/s/files/1/0467/7900/7129/files/gamuvasejepakubafumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/32224703074.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/notiwekatepesazezak.pdf
    • https://cdn.shopify.com/s/files/1/0461/9436/0483/files/how_to_run_snapchat_on_rooted_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/5177379685.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/xuxukav.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac5de83784e1429f9049aa2f9bfdd073.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b86c16dfe740c0a94601885d5d65a7.pdf
    • https://static.usrfiles.com/ugd/906e9f_9630b56524834d518109429c70d71425.pdf
    • https://static.usrfiles.com/ugd/1be480_7f328d8a9b7d47eb997d4b20887b2099.pdf
    • https://static.usrfiles.com/ugd/906e9f_92c38cbca435460d9e50fe38ebdb6900.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_5d75775dab0640ee8f6c73681c193fc1.pdf
    • https://static.usrfiles.com/ugd/4dd980_a72cd686e7374e29bb0861a5dfcf6c0d.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_off00005272.bin
d003aa5fd9c625d5fbc15776d26c9e8832b12591f510f5abe35a6d512cab0cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5272 5596 bytes
font_01_sfnt_off0000655b.bin
f555df5845862271fba80b667083194aaed26200aa026595f3562eae0c8bb3c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 10176 bytes
font_02_sfnt_off00008819.bin
2906e013a2c12f8438753706de5a20d0a45d34478d649377d82f29cc76ae0543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8819 16108 bytes

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