Malicious PDF — malware analysis report

Static analysis result for SHA-256 216f19d2a2ec2811…

MALICIOUS

PDF

51.6 KB Created: 2020-08-30 23:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c14f7edc265ff477b7c0581feced49dd SHA-1: 539bf2183afbd5d1438375be725685e7e34eaaec SHA-256: 216f19d2a2ec28118b2c9e9f15e7eca22b2b95966f728c83b0e08e87d1db0af9
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Romance is a bonus book episode 9 da' and the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/wix?keyword=romance+is+a+bonus+book+episode+9+da
    • https://static.usrfiles.com/ugd/1e32c2_25fd4c085afc483da393ad4ce8ee4f7c.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_40557c0597b04b17b6a14fde9e176f88.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d9449bcc04a4a73972dae8474ec9713.pdf
    • https://static.usrfiles.com/ugd/9a242c_63e8f7f6d83a43fbbab547f7885dae4d.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/89597014138.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/kilusisoxejo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/66182913030.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/checkpoint_ccsa_exam_cram_2.pdf
    • https://static.usrfiles.com/ugd/a107db_7c80c282c5814558b8ee724e46ef67d1.pdf
    • https://static.usrfiles.com/ugd/4b68be_3041d4beb761495cabbc2383f6e60b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea4791ef89ca4ce79789d26a538d9868.pdf
    • https://static.usrfiles.com/ugd/b8c837_de1340f1607743f594209bed08f197e5.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_off00008ccb.bin
ab8f82c21a78e58e69a2567d3e4e82fd8dd7d51063df5010b254e49f35e40040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCB 5456 bytes
font_01_sfnt_off00009f3e.bin
5f07b005a2ce089a2224e441b6fc04826e3a0ec0d259cb6726eb821700a34d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3E 10060 bytes

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