PDF malware analysis — malicious · b8aca031fb313940

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 449ff78d152691b6669dc05d2029c8b4 SHA-1: 8b0b51aeb1d07f575c54870983a51e4e5b4eb039 SHA-256: b8aca031fb313940db914de4049bda74e1b3c2e0503623a728c41160840ab8b9

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to seemingly benign PDF files hosted on CDNs and Shopify. However, one critical heuristic identified a link to a known malicious redirector, ttraff.cc. This suggests the document is designed to trick users into visiting malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=ng%25E1%25BB%25ADi+qu%25E1%25BA%25A7n+l%25C3%25B3t+ph%25E1%25BB%25A5+n%25E1%25BB%25AF+ch%25C6%25B0a+gi%25E1%25BA%25B7t
- https://static.usrfiles.com/ugd/de65f7_b799b5a7b3154fcabff1f7ee4853a272.pdf
- https://static.usrfiles.com/ugd/f84671_60465454ed1249fea9ed429c0d5f4170.pdf
- https://static.usrfiles.com/ugd/7ea8bb_1ca302ca67544ee1966a6a2055af2343.pdf
- https://static.usrfiles.com/ugd/b8c837_46dc87ecc9b048e3a764ab1bcb320ec0.pdf
- https://cdn.shopify.com/s/files/1/0432/6483/5737/files/24158715687.pdf
- https://cdn.shopify.com/s/files/1/0430/1615/9385/files/sibonavemulexivok.pdf
- https://cdn.shopify.com/s/files/1/0432/2200/7965/files/a4_size_paper_with_lines_and_border.pdf
- https://cdn.shopify.com/s/files/1/0440/7105/9608/files/purulutekex.pdf
- https://cdn.shopify.com/s/files/1/0427/4061/3286/files/81457885661.pdf
- https://cdn.shopify.com/s/files/1/0438/3942/2626/files/98834573941.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
- https://cdn.shopify.com/s/files/1/0430/3929/3593/files/84003137523.pdf
- https://cdn.shopify.com/s/files/1/0439/1229/8648/files/zaresabikofupexujewo.pdf
- https://cdn.shopify.com/s/files/1/0460/6276/4187/files/kaledo_style_crack.pdf
- https://cdn.shopify.com/s/files/1/0431/5650/4744/files/15769707616.pdf
- https://cdn.shopify.com/s/files/1/0434/6180/4197/files/zovarufavenevamipof.pdf
- https://cdn.shopify.com/s/files/1/0431/4644/4960/files/10436433643.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_off00005f49.bin` `041a87f6af23934936dd50fd0e4cff2c115f0e82ee5ebc18f99350f1b68cd4a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F49	6372 bytes
`font_01_sfnt_off000072af.bin` `fe0f89e71b6621b2b1ab7046fa5c24d6cc4dc1bb87f8135091aa1aef3fcbd5b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72AF	21680 bytes

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