PDF malware analysis — malicious · 30b6daae042da73e

MALICIOUS

PDF

45.8 KB Created: 2020-08-22 02:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a89c383407a5daa0a8200ac858721b00 SHA-1: 8550a9806dbeede50e2115b5bca721e1d205c4d3 SHA-256: 30b6daae042da73ee1d85410137ce81b61bbd965f6548668e4dbd52f7c36b944

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One of these URLs, 'https://ttraff.ru/pify?keyword=capotia+crafting+guide', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or a redirection scheme to potentially malicious sites.

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.ru/pify?keyword=capotia+crafting+guide
- http://files.sherryahudson.com/uploads/1/3/2/6/132681824/3244bae.pdf
- http://files.maryanndidriksen.com/uploads/1/3/1/3/131384432/2945282.pdf
- http://zazatu.43squadronassociation.com/uploads/1/3/1/3/131379552/9413231.pdf
- http://files.annamoller.co.uk/uploads/1/3/1/4/131454603/df316a9d6b7a.pdf
- https://cdn.shopify.com/s/files/1/0434/6858/7174/files/torukakirabolepazepuz.pdf
- https://cdn.shopify.com/s/files/1/0437/6684/1505/files/oxford_dictionary_thesaurus_apk.pdf
- https://cdn.shopify.com/s/files/1/0431/6738/3713/files/wujevuvilesenosomiw.pdf
- https://cdn.shopify.com/s/files/1/0434/5338/2822/files/duodenal_atresia.pdf
- https://cdn.shopify.com/s/files/1/0431/4054/6714/files/topejoniro.pdf
- https://cdn.shopify.com/s/files/1/0430/3260/8917/files/99249182777.pdf
- https://cdn.shopify.com/s/files/1/0432/2371/1903/files/vezajafadokaxofit.pdf
- https://cdn.shopify.com/s/files/1/0440/0021/5190/files/linegefukuxuzija.pdf
- https://cdn.shopify.com/s/files/1/0433/8014/6339/files/faxikifazojo.pdf
- https://cdn.shopify.com/s/files/1/0460/3651/7028/files/baksana_sheets_nz.pdf
- https://cdn.shopify.com/s/files/1/0434/8080/9622/files/paediatric_neurological_assessment_form.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000671e.bin` `80af04f44982e5217681dd93d80f94d7ab380242b58e941f12257907a7bb87a2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x671E	5020 bytes
`font_01_sfnt_off0000782e.bin` `d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x782E	6068 bytes
`font_02_sfnt_off000087df.bin` `3f4babeab2f66ed9e3766e95c1954da30fa3f71f6dd611e4eb7f04ea002ad87f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87DF	10096 bytes

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