Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24be52149d977a8…

MALICIOUS

PDF

49.9 KB Created: 2020-09-02 06:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4abd24327ef3241f5cf94ecb4793a5a SHA-1: 5004b5b3edd3791c3859f809341c6dafdd4755a1 SHA-256: f24be52149d977a819e6413949b4c110b7d6e16f02d2d830a66a5bc03cffa38e
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking on potentially harmful content. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a phishing or redirection attempt. The presence of numerous embedded links, many pointing to Shopify, further indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=calvary+temple+audio+messages
    • https://cdn.shopify.com/s/files/1/0431/2501/4685/files/48931656560.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/fanokufarolukewizisamajon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/pikezexumagokupedaritonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/diseo_arquitectonico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/evernote_gtd_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0490332ced44525988ae3e4ed2cb481.pdf
    • https://static.usrfiles.com/ugd/b0cd75_38c359615b30452fa9ae033d1e96e1bb.pdf
    • https://static.usrfiles.com/ugd/afe78f_70bea03b830247c1a11533a2c0652a64.pdf
    • https://static.usrfiles.com/ugd/5b604d_cd8eff4eca1c430eac4c0ed1e795e20e.pdf
    • https://static.usrfiles.com/ugd/911c12_e2f73f1cc29549bab9b73570bcd5613e.pdf
    • https://static.usrfiles.com/ugd/405339_b27b0a6dd616491c9d5aa07faf46a28c.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e7b438a15d4094861e66aa57458834.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/64769637647.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/greensleeves_sheet_music_flute_and_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/34791984105.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/gedivosumojanojepiwov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eed.bin
16e327201fa27f7c760a18f14b4267b499b6a42fffb2cbb5d1b0cda42fa26f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 4156 bytes
font_01_sfnt_off00006da5.bin
f6d7b97e2416da910bb49b6bba02413cd5bbe4248168559f8f17231d4e55a18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5344 bytes
font_02_sfnt_off00007fc8.bin
6c9513aae3f662aa4dff03fdd92d336bb5fbb0f759661cd3b495254e9d147dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 3568 bytes
font_03_sfnt_off00008dee.bin
2bf2b24d6f2104dff1fd06c4c8ac5996c28aee293a18c07fe1c3b3d27e7a3c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEE 14020 bytes

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