Malicious PDF — malware analysis report

Static analysis result for SHA-256 3536bd4fc15b4375…

MALICIOUS

PDF

51.5 KB Created: 2020-08-29 09:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b3b8fda4b7787e3157ee3aa9d736da SHA-1: 7c2638330fae5678fc676f52df70fecab6c28027 SHA-256: 3536bd4fc15b437524646cacd547fd94bf857513bb2b1211cf2f8a06b59877ba
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One prominent link, 'https://ttraff.com/wix?keyword=engineering+design+dieter+5th+edition+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to engineering design books, likely serving as a lure to encourage clicks on the malicious link.

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.com/wix?keyword=engineering+design+dieter+5th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/fezuromajew.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/pdf._autotablehtmltojson_is_not_a_function.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/c_reading_from_file.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5400/files/tp_link_wireless_router_archer_c1200.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/xofuledipubuzijisigobulot.pdf
    • https://cdn.shopify.com/s/files/1/0439/0676/0856/files/petemebisarolibolafeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/zizelokawufajele.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57f4e062f4e4db0a99f852949b48775.pdf
    • https://static.usrfiles.com/ugd/b8c837_556755e53ee94a618e73870010bf5403.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2807b8336124018b65054e9d6e4207c.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c6e22575b8420095f916db2e0d5244.pdf
    • https://static.usrfiles.com/ugd/b8c837_5aa2db9ad1eb475985b158d9acbb6a1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fae9ca00ce134c25baf418245a62528c.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060fc.bin
dc69dd9b8fd1b468768e21d5194ebd373dddbcc1dc9c5bc30bd6e8f08b6db03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 5144 bytes
font_01_sfnt_off00007277.bin
03ca5f0e90e93833b7e5384fb6a60dd707475b667dcf61a13adfa5b714d0825b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 1592 bytes
font_02_sfnt_off00007a96.bin
6fc6f2806688076e94d08e118fca4c13955237c860bbaaff0260d14a79103c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 13940 bytes
font_03_sfnt_off0000a6bf.bin
d43e3ada652fb13890ce3962907ba2555b13da5596fd1ac3a94ff3c53ce5595a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BF 17436 bytes

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