Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a13360aac19da56…

MALICIOUS

PDF

47.3 KB Created: 2020-08-04 19:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c2f8cc82000740f1ee855cd53696e3c SHA-1: be686217f90d36a935c7bc86e2e6398920865760 SHA-256: 2a13360aac19da56dfa32211030bac9ed8d24f2af90ccf40e932826db7f76b9f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that is likely used in the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=file+compress+online+pdf
    • http://files.kielycup.com/uploads/1/3/1/6/131606060/2328ba536b1.pdf
    • http://files.thewanderers.org.au/uploads/1/3/0/7/130739758/22797f3e59.pdf
    • http://files.westfielddentalpa.com/uploads/1/3/0/7/130775942/bavef_kezujuwusuk_javexolizepun.pdf
    • http://files.fernandanavarro.net/uploads/1/3/1/6/131607407/katasixogap_zukoworu_tipotewazo_rirezuzazogef.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/6309169181.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/navso_p-_3013-_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/29991711616.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/satozogotejekanifopitov.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/wugesenizuxafumalezuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/deromuxukaxuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/python_create_folder.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/amsco_apush_2020_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/51631133023.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c90.bin
e3cac45d3ba2a87fd178ee394c075f0e26d643058d90ede9b168b3fbdc48e39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 4752 bytes
font_01_sfnt_off00007c87.bin
0b682713c46cd0e7792288fe258d394c6009fd88f870daa18fbe12071cb677ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 11568 bytes
font_02_sfnt_off0000a25f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA25F 4324 bytes

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