Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac35ff308aae7601…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 12:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28312b18d9537e10077f52a1109410b6 SHA-1: 8c1a9fe7c715ddac33a5fea43825fdac543aea3d SHA-256: ac35ff308aae7601dd98568cd7263018148d0b24ec7b522cf2bca398439bb694
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=cetamina+bula+pdf', which is a critical finding. Additionally, it hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the keyword 'cetamina bula pdf' and references urgency, aligning with the malicious redirector's purpose. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cetamina+bula+pdf
    • http://files.driftriders.org/uploads/1/3/1/1/131163643/37d8327a46921a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/pdf_decrease_file_size_mac.pdf
    • https://cdn.shopify.com/s/files/1/0465/3308/3294/files/lottery_grants_board_accountability_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/senobitapasof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/7031478063.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/44110752041.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/mandated_reporter_act_126.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/99586193509.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1526/files/satyanarayana_biochemistry_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/xosumosisaloladoxuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/42171744779.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_off00006643.bin
2d7fbb458adcc0c6af67bf00e23eee8e69835b67e89823862ab7815f03220d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 4960 bytes
font_01_sfnt_off00007708.bin
4f63ca2080283b00d3bf8c1697e8858e27a3e6368b6dd356b0e5eab50c5b86a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 10376 bytes

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