Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ff9703063e7519…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 20:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4973731300f0a40049ae974c104b40b4 SHA-1: 9b1ac42b2a0202bb4cb52866359dd705498782b3 SHA-256: c5ff9703063e7519762073fc724c9e2fcc8cb199d6ead7b558a092263dddd3ec
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=profit+and+loss+account+excel'. This URL is presented within the document's body, disguised as a financial document title, to entice users to click. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which are to benign Shopify domains, but the primary malicious link is 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.cc/wix?keyword=profit+and+loss+account+excel
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/82195184506.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/baahubali_the_beginning_trailer_bgm.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/28592255854.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2afee2d1ed94bb7932a785aa751725c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad074537707482d9ef2dda3d167778b.pdf
    • https://static.usrfiles.com/ugd/5360f8_2f2385d0ad464e0fb85adc9aba88eada.pdf
    • https://static.usrfiles.com/ugd/0c268c_38d22928f3f94da4836235d791df1645.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_0ed870e30f724252a49303f7447d37b8.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1351/files/jiwarepukulixedidivinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.pdf
    • https://cdn.shopify.com/s/files/1/0462/7755/8432/files/call_and_sms_blacklist_app.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/proxmox_delete_cluster.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/
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/baahubali_the_beginning_trailer_bgm

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6b.bin
6c5343d88d3c8d829748946e90af74021145ca5021029a3e9c8c29c0dd7c9026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 5084 bytes
font_01_sfnt_off00007bbb.bin
c62e99d711a9efd5e08b765026815cf6bdbbe05ca3c95bf3a4807989b1641f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 10936 bytes

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