Malicious PDF — malware analysis report

Static analysis result for SHA-256 38654dd43fb9ead6…

MALICIOUS

PDF

51.9 KB Created: 2020-09-07 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8292acacc43a6d6bf3f3ed395b373f7f SHA-1: 62284b0f4ea7924ea3715284dcfe62c7523f3a1c SHA-256: 38654dd43fb9ead64500af71e473dfb465d0bc73eb7239e2c176346de5abc86c
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Basic first aid certificate template' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links points to a link farm strategy, likely for SEO poisoning or to distribute further malicious content.

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.me/wix?keyword=basic+first+aid+certificate+template
    • https://cdn.shopify.com/s/files/1/0445/9964/0228/files/45508808540.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/malayala_manorama_news_paper_today.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/fubogiwiwepowekikun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/reported_speech_wh_question_form.pdf
    • https://static.usrfiles.com/ugd/277b62_58919e32b4ca4abbabd35e63b77a3613.pdf
    • https://static.usrfiles.com/ugd/ce5d00_20ed64db472841538e174c7d16f37ce7.pdf
    • https://static.usrfiles.com/ugd/6f7357_b5bdc00d69214aeb82deb81477d1442f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a61f382fadb41dc8f59c2b5e9716213.pdf
    • https://static.usrfiles.com/ugd/c75f60_7fd70b3bf5b3422d93ed68156e3c4541.pdf
    • https://static.usrfiles.com/ugd/74c34a_01dece7bf6a541c08f718ead49d1071e.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/bulandshahr_news_app.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/polarity_of_a_molecule_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/2003458257.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/essentials_of_business_communication_8th_canadian_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/nizufukadiramibus.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dbb.bin
c9920229531bac5a7054b74f6f2eaa9add04b7ee79c05e4fe6f464d92e7e59f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBB 5348 bytes
font_01_sfnt_off00009fd0.bin
0c0e88015495b98171455e7c9be5c4b665b09ca3f766235e9f40209173ec04b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD0 10192 bytes

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