PDF malware analysis — malicious · f3f2e5810d15aac1

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 07:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ae3a02fb28b6941e23d71b840de6ea3b SHA-1: 7ce058b8a28f9b61ef4f03c2a74e3ccad2b23257 SHA-256: f3f2e5810d15aac1e9d7a729e05ed8c722fb5933d9d5328bd6e9b65f6f529a85

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to a 'book club guide', suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The primary malicious IOC is the redirector URL.

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.com/wix?keyword=becoming+michelle+obama+book+club+guide
- https://static.usrfiles.com/ugd/b0b521_eb9cc98da1f249fd9ec2cb8a4ec8eb89.pdf
- https://static.usrfiles.com/ugd/0d2908_c597755b12894eb8a10ab34c63b7201f.pdf
- https://static.usrfiles.com/ugd/db93e9_29e073ca9dcc42b2a35b190baebdfb06.pdf
- https://cdn.shopify.com/s/files/1/0434/7727/0692/files/zazabemusigafuzupofejoku.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
- https://cdn.shopify.com/s/files/1/0431/7128/3098/files/63830608104.pdf
- https://cdn.shopify.com/s/files/1/0432/6254/1982/files/jugijapekemugumago.pdf
- https://cdn.shopify.com/s/files/1/0434/7848/3096/files/polafu.pdf
- https://static.usrfiles.com/ugd/516574_51014a1b84ac452f9deec5ddb6b87d07.pdf
- https://static.usrfiles.com/ugd/77d535_9e3761cac0204754b32084c1d3060483.pdf
- https://static.usrfiles.com/ugd/b8c837_60f23806f3894e2da67011725b957840.pdf
- https://static.usrfiles.com/ugd/5e81b9_183b5ec7240244f9a83e7859401867d0.pdf
- https://static.usrfiles.com/ugd/0d9a50_873dc83280064f08841977c89d7528b0.pdf
- https://static.usrfiles.com/ugd/162fe6_005e35abcc9a4d23ae79e980589c1c06.pdf
- https://static.usrfiles.com/ugd/99965f_12b32b62fec144368b5daf9ccb545d32.pdf
- https://static.usrfiles.com/ugd/576447_8ed8a6b2573f4a77a4e71cdb624ee8c2.pdf
- https://static.usrfiles.com/ugd/87b9a8_49bfd3ffd6d44e18b0d408db882d5779.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_off00007546.bin` `f6ca9e7706acaa6e4e3c4f036b2fc05b133d9560ba601aa85c6e80778f0258d9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7546	5332 bytes
`font_01_sfnt_off00008740.bin` `ab1d3aa28aeff9c0b5f280cc07c31378076c050d57d714454642ba15abc88e4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8740	10340 bytes

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