Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f573d0037b22057…

MALICIOUS

PDF

72.3 KB Created: 2020-09-01 19:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f89c71ee77848fdfaf23b07c67666796 SHA-1: 1b1120bff9cbe58974c3ede3f279b53a0bc37422 SHA-256: 8f573d0037b22057732f1b01d3620c15892c11bcb4199bf764484cb0ee8f186d
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=verbal+warning+letter+sample+performance'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The heuristic 'SE_URGENCY_LURE' further supports the social engineering aspect of the attack. The PDF also contains a link farm, indicating a potential SEO poisoning or traffic generation scheme.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=verbal+warning+letter+sample+performance
    • https://cdn.shopify.com/s/files/1/0446/9882/8954/files/american_history_trivia_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/duxozasepadawepuzakonilig.pdf
    • https://cdn.shopify.com/s/files/1/0457/3973/7244/files/contrast_linking_words_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/arrow_of_instant_damage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3768/files/estadistica_descriptiva_cordova.pdf
    • https://static.usrfiles.com/ugd/b8c837_14adb31cc52b42c2910f88d46b30196b.pdf
    • https://static.usrfiles.com/ugd/ca300b_341340713115414ba2885a4692642146.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca8b8eee8d4640038560f46e57c8d783.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60f0e16c4c7435696cc43e21fbc263b.pdf
    • https://static.usrfiles.com/ugd/b3bc21_72515334235548caa6798b9bea3d3e8b.pdf
    • https://static.usrfiles.com/ugd/f4de5e_4adf6aa241c7448b948960adee026cd6.pdf
    • https://static.usrfiles.com/ugd/47b1e8_5c11e76256bc49fb91a83809ab63310f.pdf
    • https://static.usrfiles.com/ugd/5438e3_23fe0dc5c49045099d704caee6f13f80.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/aashto_standards_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/fobofuwabijotovazarinuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/5359471905.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_off0000d39a.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 2828 bytes
font_01_sfnt_off0000dd94.bin
47b07dc3596d7d6468fc874ce9c648b115b487db7a075540674705341cea698e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5532 bytes
font_02_sfnt_off0000f066.bin
a45c2e4d3c2a549ed3b856fc2abb0327a14bd534219b4c2ec405afcf8a7cbe3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10164 bytes