Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf27fdf3c76e01fb…

MALICIOUS

PDF

40.9 KB Created: 2020-09-08 13:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bef1894d1a821985316fc5258f3040e9 SHA-1: 92679f7dcb3cd1e50244b1fba569b2ecf6d13ce2 SHA-256: bf27fdf3c76e01fb11c19a00fd3167f8623baead5f2e7ac6d4b01199b5e200cd
128 Risk Score

Malware Insights

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

The PDF contains a call-to-action lure for a 'Video converter free full version' and embeds numerous links. One of these links, https://ttraff.link/wix?keyword=video+converter+free+full+version, is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest a phishing or social engineering attack aimed at delivering further malware or compromising the user.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=video+converter+free+full+version
    • https://static.usrfiles.com/ugd/eed56f_20aa9e3f7e2a4ab5bc25af4c8b4f6566.pdf
    • https://static.usrfiles.com/ugd/e02969_2d54dd7365ce433c8b444991788f9e79.pdf
    • https://static.usrfiles.com/ugd/17ce20_013112cfa2aa46aa9cd5d07511b3d2d3.pdf
    • https://static.usrfiles.com/ugd/c8683e_f1be6f33540d4ee080558164ccd66ec5.pdf
    • https://static.usrfiles.com/ugd/2f8cea_0ba3bc3b3a2f4d69ba25f3cf038cf788.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/woruwumujeza.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/zoxosis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/49209944317.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/2018_audi_a5_coupe_manual_review.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/28340045305.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_off000062b7.bin
04f9844cb0b5b53af7ee0467faa87e12fc5b18b9a433ae900f4e133c44864fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 4828 bytes
font_01_sfnt_off00007340.bin
e03e05e20cf3702798e364885b3dd32e83effb1a34d566dcfaf74972a16ec1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7340 10392 bytes

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