PDF malware analysis — malicious · 268780af36487a42

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 15:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3f267dfc641eeb18743f91974c431e8c SHA-1: 628bbeea9b70657c04e9d5ab7244bf00f87bbba4 SHA-256: 268780af36487a42efa7fc6436268f0eb94be9f4d5493246079bd303bc229e84

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'architecture portfolio file size' and includes the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to static.usrfiles.com, which is likely part of a link farm to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL.

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/wix?keyword=architecture+portfolio+file+size
- https://static.usrfiles.com/ugd/5ad03d_edb95da175924459939decdfebd75ee0.pdf
- https://static.usrfiles.com/ugd/b8c837_b4ddae6f16c24df8802168dbf9c83dd1.pdf
- https://static.usrfiles.com/ugd/b8c837_070088fb37e64e268fdf9a8b0129cb64.pdf
- https://static.usrfiles.com/ugd/aff7ca_a6569f7be59f43379febc440ac7acd52.pdf
- https://static.usrfiles.com/ugd/8cbfce_329110130273432a89c632759639a2c6.pdf
- https://static.usrfiles.com/ugd/b5472a_1eb9cf2af1a34d01b6884ee559a1b13b.pdf
- https://static.usrfiles.com/ugd/b8c837_78becd815b094071a59ceb8afbc0b874.pdf
- https://static.usrfiles.com/ugd/ace02d_96f35c80705f42bbbd958676f0ed3edc.pdf
- https://cdn.shopify.com/s/files/1/0430/7409/3217/files/wifopose.pdf
- https://cdn.shopify.com/s/files/1/0436/6332/7385/files/ambulance_driver_certificate_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0435/2173/6859/files/business_communication_process_product_9th_edition.pdf
- https://cdn.shopify.com/s/files/1/0432/4311/0555/files/79846706219.pdf
- https://static.usrfiles.com/ugd/162fe6_bab268edc8864c23be807ca0e6763938.pdf
- https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.pdf
- https://static.usrfiles.com/ugd/b8c837_1090561acb51407e9a75fb0299b9f7d8.pdf
- https://static.usrfiles.com/ugd/9cb927_f36839ace2674b2fad64f051a45fe2ca.pdf
- https://static.usrfiles.com/ugd/c068f8_d27ee41329b541a5a0094e4cf39f9768.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_off0000649c.bin` `5f1b3c77de4f295ec3d1de9003e9c0b30128f3cecf5fecb773e2774fbea38fb3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x649C	4932 bytes
`font_01_sfnt_off00007567.bin` `b982332ffaf92c19824b602fc7bce5e4179832b34d702e2c3a025f65a20269be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7567	11460 bytes

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