Malicious PDF — malware analysis report

Static analysis result for SHA-256 a492f3e15e3f2667…

MALICIOUS

PDF

55.0 KB Created: 2020-09-18 06:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81e9fed57bb42c2d54b9ddf5b0fdb67 SHA-1: 4ba85c9be72cb9b47837f751d854fa2895c1d48a SHA-256: a492f3e15e3f2667511f700c581129bd288d382091dd01635818a2c5ae43a290
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the malicious URL and numerous benign-looking URLs, suggesting an attempt at SEO poisoning or a phishing lure. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=jury+rigg+ben+10
    • https://6ca7dced-46b8-41ab-98c3-a87a0f48a74a.filesusr.com/ugd/39a0fd_ff89dab7fc3143d88a50bc217fe1e59b.pdf?index=true
    • https://65ef1765-0587-4cb2-aaa5-d9d8873019da.filesusr.com/ugd/23a6c3_b2cd8a5e6ed7432180724bf353888c73.pdf?index=true
    • https://121e616e-279b-47f3-ba08-03a47e3cae70.filesusr.com/ugd/dcfb95_4d4f9c1fc2ab4f72aadf9725554627ee.pdf?index=true
    • https://f74b3de7-b454-485b-8b79-47f9751cb351.filesusr.com/ugd/95bb70_d388d1b296b541f5b0b7a66a28886cc0.pdf?index=true
    • https://47be44fc-e6fd-483c-a4ae-99b9bf200d58.filesusr.com/ugd/7fedcf_ab2364ef06484ebd8ebc1290f39e4e69.pdf?index=true
    • https://0f7ada1b-192d-4e7c-97d0-3c6b87983eb8.filesusr.com/ugd/934fc3_bc105a187b244802b4991eb09de91f2e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/5245/6346/files/avast_cleanup_pro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/kowofiroxidawop.pdf
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/arquitectura_sostenible_renzo_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/85001560638.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/z390_aorus_master_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/appsc_previous_papers_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/11698717451.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006512.bin
cf155fdeff7359e69bb7f96b95508dd5a8933fc7c65dc36317738783a79a0a3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 4396 bytes
font_01_sfnt_off000074ba.bin
1c9c3443647e0a5d4c5cc6478b5d6f9b57b402635b40055304df1390aceea39d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74BA 4548 bytes
font_02_sfnt_off00008440.bin
e5aa6469c5bb63221e7a2f84bc0202874329a69fc813829c6f58ee81275aa078
pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 10744 bytes
font_03_sfnt_off0000a8ea.bin
917323b300e533ac267d34efa74f9a11583352ff2beb8bb89b3b16e5cceddf38
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EA 16860 bytes
font_04_sfnt_off0000c0bc.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 4324 bytes