Malicious PDF — malware analysis report

Static analysis result for SHA-256 c307d24983c1269b…

MALICIOUS

PDF

50.5 KB Created: 2020-08-23 21:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cad1535d6717e4bacbce7d3d09083663 SHA-1: cb27d8cd84c2c338b06b11abe036226ddc01b68b SHA-256: c307d24983c1269b654e05b8d5c7aef9ce705eefd75a1aa07b0c900e3322624f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.cc'. This indicates a likely attempt to lure users to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including a redirector, supports the conclusion that this file is part of a malicious campaign. The document body itself contains the malicious URL, reinforcing its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=a+crise+brasileira+carlos+marighella+pdf
    • http://rinur.serenitynowalpacas.com/uploads/1/3/1/6/131606490/9881827.pdf
    • https://cdn.shopify.com/s/files/1/0457/7827/2422/files/galvin_green_hat_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/81000633056.pdf
    • https://cdn.shopify.com/s/files/1/0450/9813/9813/files/78092966785.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3254/files/wezewadakilevajosaka.pdf
    • https://cdn.shopify.com/s/files/1/0464/7718/1080/files/16407905752.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/90260083193.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/44478851373.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/25402341454.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/que_es_absorcion_atomica.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/pathfinder_bestiary_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/1142/1854/files/rsistance_aux_aminosides.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/mepepababajokoxejip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/credit_report_dispute_transunion.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/
    • https://cdn.shopify.com/s/files/1/0450/9813/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086c4.bin
0f2fde3c7c16d675636160e42450876d4a0dd527c94148d8631502e3eda99ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C4 5700 bytes
font_01_sfnt_off000099f4.bin
2c5669757da831ea73d7a44a263106137dd39234a2080c7891e098a3a73cd50a
pdf-font-stream PDF embedded font (sfnt) at offset 0x99F4 10244 bytes