PDF malware analysis — malicious · 3edb9b11f4944a1a

MALICIOUS

PDF

38.9 KB Created: 2020-08-31 06:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3b01d51f7d028989c0b73dbbde9225ec SHA-1: a95425a84f66f45cef90795c34b463db3ae8fd53 SHA-256: 3edb9b11f4944a1a1e7bf79c12910473ffd3d446b3552ae9d6469a61a49ca665

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=the+essential+guide+to+mold+making'. This URL is likely used to redirect the user to a malicious site. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. While some of these are marked as benign, the primary redirector is considered malicious. No scripts were extracted from this sample.

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=the+essential+guide+to+mold+making
- https://static.usrfiles.com/ugd/b8c837_8fa69218529147fcae3f294073b34b4a.pdf
- https://static.usrfiles.com/ugd/9ff9b8_983213a1a94e49d79c0b206c4596d569.pdf
- https://static.usrfiles.com/ugd/9904c2_2997206609914641b4151728a170c841.pdf
- https://cdn.shopify.com/s/files/1/0428/1358/7623/files/12081824694.pdf
- https://cdn.shopify.com/s/files/1/0429/6212/4959/files/significant_synonym_formal.pdf
- https://cdn.shopify.com/s/files/1/0432/1171/8820/files/27880787543.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
- https://static.usrfiles.com/ugd/6f9b04_7ca8db54830841c6bfed9eca27436b81.pdf
- https://static.usrfiles.com/ugd/fbccce_811b9b18d3384dc7b297ffddd24ca075.pdf
- https://static.usrfiles.com/ugd/77941b_083522f353d14a6ba4163db3b83c52f2.pdf
- https://static.usrfiles.com/ugd/0c8cc8_1bf7fe85f7714d99a117b65f589df9a0.pdf
- https://static.usrfiles.com/ugd/b8c837_bf71010f633e4f8f9dcf5413e4d7993d.pdf
- https://static.usrfiles.com/ugd/b8c837_350ed67898fa49bc8ca490459bc7a8c9.pdf
- https://static.usrfiles.com/ugd/b8c837_cbd68313aa79451b801647f1eb970551.pdf
- https://static.usrfiles.com/ugd/b6bf5b_3b54adc46046414f8bcb337a2d68321c.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_off00004cbe.bin` `aae7ab215ac39bc59b315698345d1e1cdd08f703a86035f43a51a7e55cd95314`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CBE	5036 bytes
`font_01_sfnt_off00005dac.bin` `fa67140b0d4fcbdd34f2f8a5759f7051a4c66741baa950533bc101fc16b00051`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DAC	10236 bytes
`font_02_sfnt_off000080a6.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80A6	4324 bytes

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