Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b9c34707631b9d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 20:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d920174369ff7872f1fdb93a7571b6 SHA-1: 8c3819e1f99737ed37019fef467df4bc18fc9a6d SHA-256: d9b9c34707631b9d8581043e8a07c09d31b492a97fa7dff1bcf314acbae31e56
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'cash receipt voucher format pdf'. The heuristic firings indicate the PDF is designed as a link farm, directing users to potentially malicious content via a redirector. The primary malicious IOC is the ttraff.com URL, which is used to redirect users.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=cash+receipt+voucher+format+pdf
    • http://files.hellohoneybeautyco.com/uploads/1/3/1/8/131857315/tawufaxukus.pdf
    • http://files.wordsbypeyton.com/uploads/1/3/0/8/130874433/a2f7fee1367bfd3.pdf
    • http://files.niallcrabtree.com/uploads/1/3/1/1/131163684/8b54c14.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/xosoputivo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1761/4998/files/mkv_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/lijororatadenel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/goserilezugapivadifawilev.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/entrez_gene_id.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/65579069051.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/toladalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/twilight_princess_hd_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/46853347880.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/99942060253.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/9894555506.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/50461041626.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_off00006021.bin
2002b2ea2b37e2550c75eab56419f876ab87f30217f257c238802c3877c75a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5224 bytes
font_01_sfnt_off000071f5.bin
5e20d652c687c28bace5da4cb9317eed27adc3aef57185dbbeb5d942c554bc4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F5 10152 bytes
font_02_sfnt_off000094bc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BC 4324 bytes