Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35590a305fe44b8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 04:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1296c06c6fb4ad75f67490e4ee499f SHA-1: 19c736173acfbf0277ce747f90c2b0f6e5e51492 SHA-256: b35590a305fe44b8f32eb57620a72533559b00a7910dfc02872c85f053c37b18
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, a PDF link farm heuristic fired, suggesting the document is part of a larger SEO poisoning effort to distribute malicious content. The embedded URL in the document body confirms the presence of the redirector.

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=les+contes+d+hoffmann+pdf
    • http://files.slsfnc.com/uploads/1/3/1/3/131379732/rimilazu.pdf
    • http://barirol.awakenteenleadership.net/uploads/1/3/2/6/132681670/6954362.pdf
    • http://daxos.bedfordhikingclub.com/uploads/1/3/0/9/130969742/144563.pdf
    • http://files.aggicrafts.com/uploads/1/3/1/4/131437225/56c6d27c9b0e3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/jeloredusonizebikanojasof.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/nodawofudunadikerob.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/zanopuravi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/fugabomabaxu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/5472765402.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/58942035007.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/vufobewapefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8759/files/kedofofusibibaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/sawoxaduzanufifamixinoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/94016816789.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_off0000647f.bin
ebfb2e96b77f1bd072a602c027ea0c70adc2e3861fe493f3a086e55848dedf71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 5208 bytes
font_01_sfnt_off0000761a.bin
7cbb65454f52984901ad9fe381a096e18d4a8eeda8a5514ff9f9d5baf67ed4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 11900 bytes

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