Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc71a9a986b15bdb…

MALICIOUS

PDF

61.2 KB Created: 2020-08-10 15:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0db5a876b931bef921a0f1466e30592 SHA-1: eec4b1d3442386f8ac32d7873cb82f45a02a4637 SHA-256: dc71a9a986b15bdbf96d18656b23cec2044c997cdc9495469d2ecfb8a6b5b4b2
150 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 'https://ttraff.cc/pify?keyword=las+clases+sociales+en+el+capitalismo+actual+nicos+poulantzas+pdf'. This indicates the document's primary purpose is to trick users into visiting a malicious URL. The ML classifier also strongly flagged this PDF as malicious.

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=las+clases+sociales+en+el+capitalismo+actual+nicos+poulantzas+pdf
    • http://files.this-be.com/uploads/1/3/0/8/130874416/xedamega.pdf
    • http://files.dontbeacrashtestdummy.com/uploads/1/3/1/4/131454207/lufojilutedozon-govonibi.pdf
    • http://files.organizedphotos.com/uploads/1/3/1/4/131438150/d072527262ce6d1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/d_d_acquisitions_incorporated_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/46841535424.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/27678583877.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/basic_english_grammar_book_1_saddleback.pdf
    • https://cdn.shopify.com/s/files/1/0435/7200/2974/files/22558186766.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/49071014358.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/authorize_net_test_credit_card_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/jawesajuxamit.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/wuzutekitutisagezaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/patalavavitof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4435/files/33437922957.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/11436613539.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_off0000ab47.bin
7510ad9fc1570d5aeea97ca8715a65155490117ea72c2782de7fe6c23d777f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB47 5196 bytes
font_01_sfnt_off0000bcea.bin
ee8f26c49b23dc0b4511a1ea9760d69d85928cb02505b2f2085db85fe7533871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEA 12468 bytes

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