Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e48a7f996dda534…

MALICIOUS

PDF

39.0 KB Created: 2020-09-08 02:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd7ce3cef91524f08730019925f7cac SHA-1: b3476b7c4711ddd9eeddf161fa67898621c0498a SHA-256: 7e48a7f996dda5344d11e491add4e2fdb008351a0a48eae5d58b193e292c95fd
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL and a benign-looking PDF link. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.me/pify?keyword=california+king+vs+king+bed+sheets
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/homework_copy_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/vubezevopiribofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/36074336530.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/susemowip.pdf
    • https://static.usrfiles.com/ugd/64f9d2_f38c92250acf4aa1bcd1c2fc1dba2b0f.pdf
    • https://static.usrfiles.com/ugd/865d50_7f0e77adfdd8403cb074b6fbf0a2b23e.pdf
    • https://static.usrfiles.com/ugd/b8c837_278e3a57eae84c0eab8999e0be6f1c5e.pdf
    • https://static.usrfiles.com/ugd/68ec51_ae9bcbfa28c34b1d8895fbb1f95d8e3f.pdf
    • https://static.usrfiles.com/ugd/2c8d66_4779b85a59fb443e91968003d67108ff.pdf
    • https://static.usrfiles.com/ugd/ed64d2_9d4df6a5979e4954b4ea3584ac252f04.pdf
    • https://static.usrfiles.com/ugd/0f5b72_749909209df24e4da188c44cf00746f6.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_off00005b25.bin
b99a388951e47b1fc8e3eacebb489cbe14623edce9a7ac5fc192ed81b6e1310b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B25 5340 bytes
font_01_sfnt_off00006d4d.bin
02b71b0ffcd6ef19f162b87bdecdd782585f5ff2cf47bed0d76113b86ae71245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 10092 bytes

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