PDF malware analysis — malicious · 3ee72e55ad3c8df6

MALICIOUS

PDF

37.9 KB Created: 2020-08-21 09:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ab79f87ddcb93bdca942d39f79bf7499 SHA-1: 089cc6a50fd7c7ffb785a05d3f4d42f44f10fc6d SHA-256: 3ee72e55ad3c8df627c67676ce68593f9542c46979238022edf2bd3e419bc348

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'jumbled sentences worksheets for grade 2 pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=jumbled+sentences+worksheets+for+grade+2+pdf
- http://files.sailabilitybatemansbay.com/uploads/1/3/0/7/130739919/3479141.pdf
- http://files.neasta.net/uploads/1/3/0/7/130775634/4e3fd199.pdf
- http://files.zionlutheranclark.com/uploads/1/3/2/7/132740193/4348688.pdf
- http://files.bribetter.com/uploads/1/3/0/8/130815137/1381984.pdf
- https://cdn.shopify.com/s/files/1/0428/6545/9366/files/70010506074.pdf
- https://cdn.shopify.com/s/files/1/0433/5645/5067/files/22955989664.pdf
- https://cdn.shopify.com/s/files/1/0435/1882/0511/files/hotel_california_chords.pdf
- https://cdn.shopify.com/s/files/1/0427/9389/4044/files/xawazoxozixusivegu.pdf
- https://cdn.shopify.com/s/files/1/0439/5086/6590/files/37008120910.pdf
- https://cdn.shopify.com/s/files/1/0437/8948/4190/files/kugejurolutebexudomute.pdf
- https://cdn.shopify.com/s/files/1/0432/3049/4878/files/xeriwa.pdf
- https://cdn.shopify.com/s/files/1/0430/8716/7645/files/98960821723.pdf
- https://cdn.shopify.com/s/files/1/0427/8065/5775/files/wowonowafi.pdf
- https://cdn.shopify.com/s/files/1/0430/4430/7098/files/1843780546.pdf
- https://cdn.shopify.com/s/files/1/0430/2218/8701/files/bonajawojut.pdf
- https://cdn.shopify.com/s/files/1/0433/9430/2117/files/61480210365.pdf
- https://cdn.shopify.com/s/files/1/0428/1915/8183/files/fokevenilup.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_off000052f7.bin` `223c78fbe38261512b41f5593b00c073d73c3b9490f24abcb02090bd5ef520e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52F7	5984 bytes
`font_01_sfnt_off00006738.bin` `f24b2f1b94f7252aee6d0170a5ac57ccb6b7e640097f3a0655d3449efd967ce0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6738	10276 bytes

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