Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c7739c59668086…

MALICIOUS

PDF

66.0 KB Created: 2020-08-31 02:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2d8287286ec75ccad25855d08f2b45 SHA-1: 2a161d1dd4ca19312c87bf09199c1785c8c29e7a SHA-256: 51c7739c59668086219259fd1019e5dc8ce0debeba6fb96bd33ac5dc315fe499
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=tablas+de+capacidad+calorifica'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous embedded links also suggests a link farm or SEO poisoning tactic.

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.ru/wix?keyword=tablas+de+capacidad+calorifica
    • https://static.usrfiles.com/ugd/f0f215_d1970be1514a4903beaa50387aa32d82.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1e595c142fe4d1aa22bfba95c315d95.pdf
    • https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
    • https://static.usrfiles.com/ugd/8b9728_27fa9479d1c34991b24889a2cc2854e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5115728ce64343c68e1683551c93fbcf.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/96226145613.pdf
    • https://cdn.shopify.com/s/files/1/0463/4551/9261/files/soldier_fleurie_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/18729663197.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/33252011575.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/4299691614.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/76098770861.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/pokemon_snakewood_gameshark_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/66440778538.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/arrow_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/technical_drawing_basics.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/nosomepijas.pdf
    • https://cdn.shopify.com/s/files/1/0464/2819/2920/files/nist_sp_800-53_rev_5_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/casper_apk_2018.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_off00009da8.bin
35aff00b035449bd2ce1082b4ed2c7b7da227ee13fb0cefb42a12e216f29601d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA8 5236 bytes
font_01_sfnt_off0000af7a.bin
11398fca480c57c9d706c8cd4017a33b8869f95ffc94f8759b4ed142fb9ecb53
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 17208 bytes
font_02_sfnt_off0000e3e8.bin
92e9eef5bab5402cd28dd78cc952917dc1e917ec0366d544209aa8acab859a07
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 16108 bytes