PDF malware analysis — malicious · 250cbfd22a4017bb

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 12:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 57789f30cd324f37441f4d0bc38096e5 SHA-1: de56eb76c2149cbf9b1878dbb75efab8300776f5 SHA-256: 250cbfd22a4017bb476cfa57e22231c195b5cea00276adebeb10a15e48050f09

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify and static.usrfiles.com domains, likely for SEO manipulation or to host further content. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is consistent with a phishing or scam lure. The document body, though heavily corrupted, contains text related to 'leasingdesk insurance services' and a URL, reinforcing the phishing pretext. No scripts were extracted from this sample.

Heuristics 4

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
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/wix?keyword=leasingdesk+insurance+services
- https://cdn.shopify.com/s/files/1/0429/6946/4991/files/48175698387.pdf
- https://cdn.shopify.com/s/files/1/0440/6679/9766/files/67125972862.pdf
- https://cdn.shopify.com/s/files/1/0436/3714/5753/files/english_short_story_books.pdf
- https://cdn.shopify.com/s/files/1/0428/5153/2963/files/27077767978.pdf
- https://static.usrfiles.com/ugd/451461_cbad130662a94fd4925e909065d4f86e.pdf
- https://static.usrfiles.com/ugd/b8c837_d75d49960f9c47feb215f5ad939edd75.pdf
- https://static.usrfiles.com/ugd/097bd5_d6f70410389a4f32aedc23f13e3a67d8.pdf
- https://static.usrfiles.com/ugd/b8c837_2162611fe1b243b7a8ade55af71b7961.pdf
- https://static.usrfiles.com/ugd/6d59ab_77bef4b5405b416ca156369ea571769d.pdf
- https://static.usrfiles.com/ugd/5ad03d_4b4ffec4a72348a08f6cf220f5fd2190.pdf
- https://static.usrfiles.com/ugd/b8c837_1c9c9cb729df4c818de01045768e1714.pdf
- https://static.usrfiles.com/ugd/a18aa6_3d03b75aceb945e394d7dda36e790386.pdf
- https://static.usrfiles.com/ugd/c20ea7_d6c2143162d14b6fb09aee23d1b6c735.pdf
- https://static.usrfiles.com/ugd/f8de3e_f471ad27d4e6449eb5b7019758eb0dd2.pdf
- https://static.usrfiles.com/ugd/b8c837_a91bce7aa46a49479a868f6e3fa68656.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_off0000778b.bin` `903964ebe1b06fa9e9099534ee3a43356be66dc3eaa777c456dbcfb1c125c531`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x778B	5140 bytes
`font_01_sfnt_off0000892a.bin` `51a3184045fffc6d1ec5caf56cbe42291e47622db96e9df003d0b60604f2e978`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x892A	11056 bytes

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