PDF malware analysis — malicious · 8f43d691adb66c14

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 00:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9d5cfcbfbfe9b7b2e3ef2c06813616c6 SHA-1: 98878a00ebda341207fcbef545ee0731e77a0785 SHA-256: 8f43d691adb66c148f84b430cd9313da08b9f327c3ea2e855545676d84362d07

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One prominent link, 'https://ttraff.cc/wix?keyword=reading+comprehension+worksheets+b1', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to reading comprehension worksheets, suggesting a lure to entice users to click 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.cc/wix?keyword=reading+comprehension+worksheets+b1
- https://cdn.shopify.com/s/files/1/0428/4504/4892/files/xomatalagudosusuba.pdf
- https://cdn.shopify.com/s/files/1/0431/0653/3525/files/54279064088.pdf
- https://cdn.shopify.com/s/files/1/0430/2176/2723/files/senanutabelariwifigoge.pdf
- https://cdn.shopify.com/s/files/1/0431/4021/9037/files/xevejukokugibopikowig.pdf
- https://static.usrfiles.com/ugd/b8c837_24e161106c194280bc354221f0f6fc7c.pdf
- https://static.usrfiles.com/ugd/1cc7e8_a0abab11e5a746efaf3877d03be6ce25.pdf
- https://static.usrfiles.com/ugd/8b49c6_74f014d26acf4468b5bc17f0b7e6b197.pdf
- https://static.usrfiles.com/ugd/0a0016_508e567245c94e07aa8d2dbe1f85bfcf.pdf
- https://static.usrfiles.com/ugd/b8c837_9e726f13ab8c42808e45e892aa7dce36.pdf
- https://cdn.shopify.com/s/files/1/0433/7706/6135/files/imperial_death_march.pdf
- https://cdn.shopify.com/s/files/1/0433/8650/3324/files/networking_courses_list.pdf
- https://cdn.shopify.com/s/files/1/0437/3217/2951/files/el_hinduismo_libro.pdf
- https://cdn.shopify.com/s/files/1/0432/4245/5207/files/animal_totem_tarot_book.pdf
- https://cdn.shopify.com/s/files/1/0433/3341/9166/files/30993835232.pdf
- https://static.usrfiles.com/ugd/b8c837_9dae9b710cb74eef81b00a83a76f1166.pdf
- https://static.usrfiles.com/ugd/b8c837_2a4cd7e5bdb84ac685d4471abb899625.pdf
- https://static.usrfiles.com/ugd/3826db_71b023e920e34d5a88a090f06a41f4dc.pdf
- https://static.usrfiles.com/ugd/217d68_43f8058b4e874d3f93bdcf6a0072c46c.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_off00005f6b.bin` `e5d7608bd786e2ff80a49e972e3fa289a35cd6eb8f77b15b9eebf25f0a60b014`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F6B	5808 bytes
`font_01_sfnt_off00007311.bin` `0395cb81582c63b2385b13ea574ce5aa53dd7c2b30bd99f94765b5a4ff79933c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7311	10368 bytes

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