Malicious PDF — malware analysis report

Static analysis result for SHA-256 c408fc5c4d23f786…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 12:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd37aeb8e0d01c116c1876e883ee3d0a SHA-1: b4447468a00ac79ca983f8fef4408b22b8816f8a SHA-256: c408fc5c4d23f78696b63a50659e9d511af24643078daa85dc9f25c4c3b6ee97
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious URL, 'https://ttraff.cc/wix?keyword=modern+warfare+christmas+map', is identified as a malicious redirector. This suggests the document's purpose is to trick users into visiting malicious sites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wix?keyword=modern+warfare+christmas+map
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_55e7767d0cdd483a97363b0b4daa3e13.pdf
    • https://static.usrfiles.com/ugd/c1615c_04b8233201374e87801b5c13b4ba9f91.pdf
    • https://static.usrfiles.com/ugd/1c90dc_5b16417e25da437aacfa6b6eb381dd63.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef9c58fd780d47ad954c7516dc40384f.pdf
    • https://static.usrfiles.com/ugd/b8c837_407c605c881c44f1a4d6a1741ebced12.pdf
    • https://static.usrfiles.com/ugd/b8c837_acc9996442cf4f24886946e74f2cdc9d.pdf
    • https://static.usrfiles.com/ugd/3aee12_ea48e7bf701245a58b8f79c2eefc0fbf.pdf
    • https://static.usrfiles.com/ugd/63022f_05389e3cb3e1487d893e469438a19664.pdf
    • https://static.usrfiles.com/ugd/217d68_b95a09de58164a149a0d7f1b3fffd469.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a0088304dd743208e9aae5d234ebfd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb47b5f1d4014dbdb96ac6e2fda0fb45.pdf
    • https://static.usrfiles.com/ugd/b8c837_712dbd5c204d4b4094da27ff0538d1a6.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_039ffd6861a54aa79a91efec3ecd40ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/carry_on_jatta_2_punjabi_movies.pdf
    • https://cdn.shopify.com/s/files/1/0459/8693/9047/files/19265886737.pdf
    • https://cdn.shopify.com/s/files/1/0464/7606/6966/files/goliwivutofo.pdf
    • https://cdn.shopify.com/s/files/1/0450/3499/5870/files/le_bergsonisme_deleuze.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_off00006716.bin
2e9a1b4349448193b4ba0ea46b9a72c8b903f553258dc0293f182ce5234a4fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 5460 bytes
font_01_sfnt_off00007997.bin
97fdcf07f813001941b97871cb74fd6b2f62baf1bd79aa63ef09917092b4e0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7997 10624 bytes

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