Malicious PDF — malware analysis report

Static analysis result for SHA-256 830244008db56a67…

MALICIOUS

PDF

55.8 KB Created: 2020-08-18 17:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3a17dff7c403e17744212bc7740c3e SHA-1: 56846794606b3055760dd19232ae22fa2b55c255 SHA-256: 830244008db56a679550a7ae25d5e5316997aae09feb3a40db4ff188683b0c39
120 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/pify?keyword=surjective+function+pdf'. Additionally, it features a PDF link farm heuristic, with the first URL being 'https://cdn.shopify.com/s/files/1/0429/2696/4895/files/cisco_ccna_labs.pdf'. The document body, though heavily obfuscated, contains references to the redirector URL, suggesting a social engineering lure to a malicious site.

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/pify?keyword=surjective+function+pdf
    • http://kuzij.oneflagdrt.org/uploads/1/3/1/3/131383664/3980a.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4895/files/cisco_ccna_labs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/63567419776.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/94364023877.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/xotigekezazafejefus.pdf
    • https://cdn.shopify.com/s/files/1/0428/1031/0822/files/17350399499.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/masadezulokejejitafuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2054/files/probability_questions_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/6618842117.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_off000078f5.bin
cb2c9b177baa592669484cccaa1166e9527d376dbd15d3accd0e668ec12c604f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 4968 bytes
font_01_sfnt_off000089fa.bin
bcb0b69f41e944deef99c27795c6504845bcb493c50604122764a22428bdb881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FA 15348 bytes
font_02_sfnt_off0000babe.bin
cbf75d2433ea1adb2adce9006aa74b3783189216d298021fbfb9855b341baa25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBABE 16644 bytes

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