Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efbd3d824d2ec81…

MALICIOUS

PDF

34.7 KB Created: 2020-08-13 01:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87b1d96e50f3da59d129f0b4840ce9d5 SHA-1: 54bdc9edae61c5609bb285aabbb7114ba1c10aab SHA-256: 9efbd3d824d2ec81429556dfa025870f08f32f5e7e0fd061ffef41585ef2241d
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a phishing or social engineering lure. The primary attack pattern involves redirecting the user to malicious infrastructure via a link farm.

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=intermediate%20english%20assessment%20test%20pdf
    • http://files.leannewaterhouse.com/uploads/1/3/0/7/130776861/1549719.pdf
    • http://jemoduju.aftercrafter.com/uploads/1/3/1/0/131070306/tosupa.pdf
    • http://gosopasa.christcenteredironworks.com/uploads/1/3/0/7/130775373/310474.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/mariage_d_amour_piano_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/amazing_grace_hymn_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/bimutoxixipake.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/63334913239.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/91192249061.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/zapuvasine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/bugoforeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8093/files/neverwinter_nights_weapons.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/23450568989.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/23103831361.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_off00004ad3.bin
5f33ee1df248a3d2f0666d4b7f40b8704e66c4fdce0c8a1360e84b82f19d86f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 5392 bytes
font_01_sfnt_off00005cf2.bin
7ab15692d5e2c12c2bd3ce8a716a2a645d23853b7b6e0cc98bb646b04436f1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 9708 bytes

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