Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbfe1037243919e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-12 11:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3d27a1fb0fd14afdbd7b3ac5b85218 SHA-1: 61f63a5e7c6a30ec08a5f0cd3aee082a29552079 SHA-256: 3cbfe1037243919e20dfb77a038c0b11fbba6d3a13a79a5db0cbb3270dc8b845
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic indicates a PDF redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though corrupted, contains the text 'Non probability sampling advantages and disadvantages pdf' and the malicious URL, suggesting a lure to disguise the malicious redirection. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=non+probability+sampling+advantages+and+disadvantages+pdf
    • http://sexojap.bmystiic.com/uploads/1/3/0/8/130874493/rorapimepenedalaguse.pdf
    • http://wikoxa.monicassweetcakes.com/uploads/1/3/1/6/131606289/4221253.pdf
    • http://files.katephelps.com/uploads/1/3/1/4/131406211/taluv_radomafasolugu_zebodarizeduvin_guser.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/xetuzamigugevaxixoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/29913693155.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/45643696698.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/85353932154.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/jujaxafoluvowefivofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/27791757698.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/mapa_so_miguel_aores.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/sawegudofes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/zizexetubijuxuxosukefuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/91873824560.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/zowunemugopuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/50146498818.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/python_script_for_ssh_connection.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/79362271205.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/fidutuwaxididapaxo.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_off00006c5f.bin
cd4dc65cd1d236e235bfc920e9e337a346a47e3e8dc785f841d81d8782f8305b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5F 5632 bytes
font_01_sfnt_off00007f78.bin
ef50e4d6eadffd486821d45e6ba624e9c6cc311fbe5a0d07197c94dabcbb5946
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F78 10796 bytes