Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d189c13284a8f8…

MALICIOUS

PDF

71.1 KB Created: 2020-08-14 12:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aeaa8f265d46c2abb28ec517a9d359f SHA-1: 9ad323bb6428f2034b81bd60e13146eafd83b079 SHA-256: 21d189c13284a8f869bd3672576a2c33deaa6d0c9cfa7bd0e527c380b51644c4
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to a 'mepco casual leave form', suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to potentially malicious or unknown domains. No scripts were extracted from this sample.

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.com/pify?keyword=mepco+casual+leave+form
    • http://files.henleygreyproducts.com/uploads/1/3/1/3/131383514/5789019.pdf
    • http://files.pascalletourneau.com/uploads/1/3/1/1/131164052/56d25910.pdf
    • http://files.hd1live.com/uploads/1/3/2/6/132695942/dc1c053539a50.pdf
    • http://files.airbrushartstudio.com/uploads/1/3/2/7/132712057/baduf-denonalejubejur-binawofetawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/denawafateluniserudozenuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/pupoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/niwivibopulofaxoziki.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/large_file_sample_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/roxerufapiruridi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/dieta_cetogenica_tramos.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/xewutivutesitegabasik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/canon_mg_3520_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87664315042.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/70874947305.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/7807568468.pdf
    • https://cdn.shopify.com/s/files/1/0453/5566/3515/files/small_to_ppt_converter_online.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_off0000c7c0.bin
78ea4fce4f5c58354040121b77b884448446cff6b24d6b5932601e0e86d95e4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C0 4872 bytes
font_01_sfnt_off0000d85d.bin
185baf3d319e955a0efb863a842538610ea0ded2dfcea7f070a461676748b87a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 12868 bytes
font_02_sfnt_off00010161.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x10161 4324 bytes