Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fd18963bf2a294…

MALICIOUS

PDF

39.9 KB Created: 2020-08-03 20:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5301bc74aa86a4f57c2d919a20525bee SHA-1: 3cc20277bca03f4b265859c11c61396a7fb922a4 SHA-256: 79fd18963bf2a294fbd3bb429ad8f0448736a846f008654e2044de1706628d59
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as educational content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF exhibits characteristics of a link farm, with numerous links pointing to external resources, as indicated by PDF_SEO_LINK_FARM. The embedded document body text, though corrupted, contains the URL and keywords suggesting a lure for educational materials.

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=addition%20worksheets%20grade%204%20and%205
    • http://files.shoptrunnellsfarmmarket.com/uploads/1/3/0/7/130775286/5236563.pdf
    • http://files.ocswimcall.com/uploads/1/3/2/6/132696465/6552502.pdf
    • http://files.quadrium-aerospace.com/uploads/1/3/1/6/131636965/wumefenakuve.pdf
    • http://files.erichreimer.com/uploads/1/3/1/4/131482931/negagakizali_lebekifi_wivonotuxe_wodozezadaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/94853111148.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/37176182297.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/saneneg.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/wild_magic_table.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/79318010841.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/36771207268.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/dell_latitude_e7240_specs.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/kezagamen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/github_bios_dreamcast.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/gunojugibalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5832/1818/files/18142396330.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_off00005e1e.bin
5abd4d678099784351276abe42f56edda0714e7a3f91397e7b0f744b02bc5d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 5412 bytes
font_01_sfnt_off0000709d.bin
0da317cecb78caf506ccc4cefefe014768055ef8b249a5c5d5bcf276623dc000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709D 9992 bytes

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