Malicious PDF — malware analysis report

Static analysis result for SHA-256 8409fcc201d8eedc…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 07:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f68b68709a88d3a8268eb7f2fc3d0a16 SHA-1: 378a0a2cbb54bd5344199048549920d26ae4d161 SHA-256: 8409fcc201d8eedc49ffa7fa35ed44bbb758aea60943e172d74bf332400f6cee
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure via the URL https://ttraff.com/wix?keyword=download+jay+rock+90059. Additionally, it exhibits a PDF link farm, with many links pointing to static.usrfiles.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting a lure to a malicious site.

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.com/wix?keyword=download+jay+rock+90059
    • https://static.usrfiles.com/ugd/b8c837_6ca4e78d6af945fc8886cab44fc42ce9.pdf
    • https://static.usrfiles.com/ugd/83b1b3_df37d7e0821644e492ed7e4a5ada3ad3.pdf
    • https://static.usrfiles.com/ugd/33ab24_a5f34762e74643eeac254e2d3fa581f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2bea7a2424b4e5a95fd7814cc3b2ccd.pdf
    • https://static.usrfiles.com/ugd/c20ea7_03af91f2588845baa1b68dbb505807a2.pdf
    • https://static.usrfiles.com/ugd/850f07_e061fc81117e499b96c69bc7c09a1e50.pdf
    • https://static.usrfiles.com/ugd/69695d_87e4ef6f0ff24b57b1e488c64c3099f3.pdf
    • https://cdn.shopify.com/s/files/1/0464/7183/9896/files/cessna_421c_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/ladum.pdf
    • https://cdn.shopify.com/s/files/1/0430/9113/2567/files/rakijolisexipotuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/pdf_password_cracker_pro_v3._2.pdf
    • https://static.usrfiles.com/ugd/374ce0_a193a96c9589485c98926b4cf9f5e2bd.pdf
    • https://static.usrfiles.com/ugd/3aca14_90fabbea9b7e4026a049abaea23c21db.pdf
    • https://static.usrfiles.com/ugd/9421c8_dd5df136beb4464cb840d444e24da374.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_off00005395.bin
3ebc914669eddd48a1013caa62020924df7ae895e5658d144881ac7b96edbd64
pdf-font-stream PDF embedded font (sfnt) at offset 0x5395 5052 bytes
font_01_sfnt_off000064ee.bin
ccbaf3b805c721bbcac4389dd285cb64c898519bed0b519834087547759156fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 10284 bytes
font_02_sfnt_off0000884a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x884A 4324 bytes