Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd870a28a34b101f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 18:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72eb138760a836b8e2fc1f5f24a6bdc4 SHA-1: 4aa7a9051be696f9d3836aa92104d1081da1ffd8 SHA-256: dd870a28a34b101f20172f4f8a47cca51f909fc00565f40bdec5bce7f3a1a99b
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Satoshi Nakamoto blockchain paper pdf' and a URL that appears to be a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to attract victims. The primary malicious URL is ttraff.cc, which is flagged as a malicious redirector.

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/wb?keyword=satoshi%20nakamoto%20blockchain%20paper%20pdf
    • http://files.gatewayhotel.com/uploads/1/3/2/6/132695339/61a6f2a7b731a6.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3507/files/83454833500.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/70504249145.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6102/files/gugenobafagitunaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/dolejusiwud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/wogiluv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/fitipaxumusabiwutebetov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/mental_health_check_up.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/89637814263.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/boilers_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/raponidesijutibumukukeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/66060631815.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/23060121802.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_off00006ab5.bin
1216948d40c925fd128a478b85f61eb4ac6d150bb32d466eb3121c69b11c4303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 5704 bytes
font_01_sfnt_off00007dd5.bin
12198662d16a3b4c86e9292f6d703698fc2e3ff6dfe19fb49af973eb8addd146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD5 13484 bytes

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