Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d4e4d86a8d3949…

MALICIOUS

PDF

47.3 KB Created: 2020-08-31 00:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2492a47f665e9e08ee430fecfa00b868 SHA-1: 5cae479a07e9c67e54e973c9b4ef082e6b38170a SHA-256: 47d4e4d86a8d39499aac2474fda224db6b5223c3a56e583c90b1df2a13b7fe05
154 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing links to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'static.usrfiles.com' being a dominant host. The ML classifier also strongly indicated maliciousness. The presence of these numerous links suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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=la+lengua+de+las+mariposas+detailed+plot+summary
    • https://static.usrfiles.com/ugd/b8c837_63be9aad80654b8fbedc3e38fa9dc152.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dcbb7440464f94805d8184ef6f772f.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_c79a30c6b8014cc8ad93130ecd1487a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b095c442ef94b3787f66763fc65ede3.pdf
    • https://static.usrfiles.com/ugd/cc14e4_4f4267e9cc474304aedfae925cd44d94.pdf
    • https://static.usrfiles.com/ugd/2074c9_416a6389b0b1460781a9472640ef050f.pdf
    • https://static.usrfiles.com/ugd/f96b02_7a43acd48ede40d2bd933cdf9d99022c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b0faf57070d4187bef536e0dec52e7e.pdf
    • https://static.usrfiles.com/ugd/d4da64_c6d6fd04cffd499fa22add7ad9f33bec.pdf
    • https://static.usrfiles.com/ugd/bfbc46_c94eee36533747acb7473b31bfe74355.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_52998d4549ce4d0faf0740593a0e660b.pdf
    • https://static.usrfiles.com/ugd/97493d_55e667417dac43ceb264ed5f7766663d.pdf
    • https://static.usrfiles.com/ugd/b444d4_211c8b6c3f1d46379c5dce415edc24e4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/lituweborofepodo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7575/6181/files/chart._js_legend_template_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/wutusaxeralodoruzatiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.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_off000076a5.bin
ac529d42988e93a1ce1310a8b95d68b2b158a372269af680e98bf67af78afa7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 5320 bytes
font_01_sfnt_off000088b2.bin
f44c7b3b7017eaefebfd310b2b428f57d54c4b8932baf5910992de518d5a1336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B2 11012 bytes

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