PDF malware analysis — malicious · eb1ce60ed3fe45d4

MALICIOUS

PDF

41.5 KB Created: 2020-09-04 08:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ba0ec7f4b4d384d292cadc16856e5746 SHA-1: e239b553492eae30fa64dc26d5532dc11918be06 SHA-256: eb1ce60ed3fe45d45428663fc06b9f6943a5a1a03a348392d259da93fbdfd6d7

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded document body text, though corrupted, suggests a lure related to 'technical english 3 course book answer key'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=technical+english+3+course+book+answer+key
- https://static.usrfiles.com/ugd/3f80ec_8a68a329587d402c89a2cbcba011c45f.pdf
- https://static.usrfiles.com/ugd/de60da_e29ee252c1c64b4894a7f7d4746d416a.pdf
- https://static.usrfiles.com/ugd/b8c837_94ebdc909c7447589fc4695df380f5fd.pdf
- https://static.usrfiles.com/ugd/217d68_e9ee6a6b23fa486ea23225c1ec4e301a.pdf
- https://static.usrfiles.com/ugd/b8c837_a2d1886b0e294039b52644c7ba0f0d09.pdf
- https://static.usrfiles.com/ugd/b8c837_ffa8688089a64fd181585a1459adc7e0.pdf
- https://static.usrfiles.com/ugd/d79848_f4e7cdf4609c45478a3c7a26377db5a3.pdf
- https://static.usrfiles.com/ugd/7be1cd_36d7bdd6ef2c4813a082157b46979acb.pdf
- https://cdn.shopify.com/s/files/1/0427/7351/2359/files/96015180149.pdf
- https://cdn.shopify.com/s/files/1/0428/8852/8035/files/lurudunop.pdf
- https://cdn.shopify.com/s/files/1/0435/8055/5419/files/xubenazudedabul.pdf
- https://cdn.shopify.com/s/files/1/0432/3459/0888/files/darkness_rises_guide_archer.pdf
- https://static.usrfiles.com/ugd/97634b_eca163fff4b54c758cfeb3fda2e7cf2a.pdf
- https://static.usrfiles.com/ugd/b8c837_fb53133584154903b1f367876c521722.pdf
- https://static.usrfiles.com/ugd/ff3115_752a713b7ace49b4b0abc1ef6cd4ed72.pdf
- https://static.usrfiles.com/ugd/9734e7_7eb6b3e5f380435cb8edeebcf474a20b.pdf
- https://static.usrfiles.com/ugd/fe83c3_3b55e96009144ae5a1a2edba23dadce7.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000639b.bin` `1b2dfced016d5e98e24e1f2f6770a26d0f7cdc04ffa39a1b89203297d4935f18`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x639B	5572 bytes
`font_01_sfnt_off000076a4.bin` `c8e817b746e20d0258ef4cd177b42f7aba6483849b1ec6a5d59fd3878a9b2f84`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76A4	10060 bytes

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