Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72c8bd2081ede7…

MALICIOUS

PDF

47.6 KB Created: 2020-09-19 04:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6bddfd5cec804111a1226f085c41f1c SHA-1: 692a71cb59cac8115a121f3fcdf6413269e02909 SHA-256: 1e72c8bd2081ede7a50c58eb313149dbc0a1f8093bb7a711c93f89d49e39f75c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a search result. This link leads to a known malicious domain, indicating a phishing or social engineering attempt. The PDF also contains a large number of external links, characteristic of a link farm, further supporting the malicious intent. The ML classifier 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.link/wix?keyword=resumen+de+don+juan+tenorio+personajes
    • https://d476dcf3-d742-498c-9c26-5aa37ef08b13.filesusr.com/ugd/3ed902_baa61233dea7462182f475272c75b893.pdf?index=true
    • https://57566cf4-3078-445b-992a-a8a3c12f6354.filesusr.com/ugd/a467d2_ce9175b965974608a2ee3e36993e13a1.pdf?index=true
    • https://a945fe2a-eb09-4c28-8f67-ba65ae844ce1.filesusr.com/ugd/6924eb_35ee6f91ecce409eb07bc649eb1d2189.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0481/0771/6771/files/jobezedisonoxaxuwesopegud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8642/files/moxuzegafisuwutagudamegap.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/rabepekufisubeneforuxa.pdf
    • https://cdn.shopify.com/s/files/1/0460/4008/8740/files/11900351375.pdf
    • https://cdn.shopify.com/s/files/1/0467/6019/8307/files/yakuza_black_panther_english_patch.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/74768062056.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/biological_membrane_and_transport.pdf
    • https://cdn.shopify.com/s/files/1/0459/7311/0951/files/developer_mozilla_javascript_guide.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_off00007ae4.bin
1e0cc9d0b98d72439cbf79f478d9ec45029384c39eb275526953e25f47e686f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 5156 bytes
font_01_sfnt_off00008c59.bin
55cd9e9b2987d47855c63f5d42b438f34785adecafb0816b39ef89da222f235d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 11520 bytes

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