Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5db7565d4e9f93…

MALICIOUS

PDF

52.7 KB Created: 2020-08-14 21:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b4c1a2a079fb191b5a821d13b37a20b SHA-1: 31547e3eeb4805b3ca2d5a10738f5ac382527f26 SHA-256: 4c5db7565d4e9f93c52e46d81f13bb5207608cbbbe918813d434fef07f45e21b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources hosted on platforms like Shopify. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=reforma%20agraria%20guatemala%20pdf'. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=reforma%20agraria%20guatemala%20pdf
    • http://files.lexihermistondestinationweddings.com/uploads/1/3/0/8/130874265/61e5aa7ca4a368.pdf
    • http://files.fairlawnlutheran.org/uploads/1/3/2/6/132681544/puxoma.pdf
    • http://mipawon.reformedholytrinity.org/uploads/1/3/0/8/130814110/847357.pdf
    • http://files.minischnauzerpuppiesnc.com/uploads/1/3/2/6/132695734/3641914.pdf
    • http://files.jacinthaclark.com/uploads/1/3/1/6/131637056/9841322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/pexowupifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/western_stoneware_crock.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/account_equation.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/99444306598.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/52387641586.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/20566617610.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/binaural_beats_frequencies_and_effects.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/39224461625.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/juvubufufomavanom.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/govulonubuxoxovefepu.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_off00008cdb.bin
a3670f7c3766c71088b40e7dfa2aaad7eab837846879bf97dbe70664ca97e2d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDB 5192 bytes
font_01_sfnt_off00009e74.bin
6f85a630e5b0f99ca1d3f174a6b829b157637abb4d7aac91ff18c23a64404b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E74 11480 bytes