PDF malware analysis — malicious · b38e943456c93216

MALICIOUS

PDF

41.8 KB Created: 2020-09-07 04:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 779a588fac5d38e10ae81473a7452fa6 SHA-1: bb703c146d6cd9e6bf2839c359dec49721382f34 SHA-256: b38e943456c93216eac1655e4b626f20425ccdeea3f07362e9b1aa2c3b9bb48a

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a lure for a 'relieving letter format' and includes a visual download button. It embeds numerous links, with one critical link pointing to a known malicious redirector at 'https://ttraff.me/wix?keyword=relieving+letter+format+from+employer+to+employee'. This redirector likely leads to further malicious content or malware download. The file also contains a link farm, suggesting an attempt to manipulate search engine results.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.me/wix?keyword=relieving+letter+format+from+employer+to+employee
- https://static.usrfiles.com/ugd/4b7290_dabc2c8d905a47fd876f97a1c88d9b5b.pdf
- https://static.usrfiles.com/ugd/b8c837_67e202df558441b9b48a5e8b9e5731da.pdf
- https://static.usrfiles.com/ugd/c1615c_ebebdc98c0d14139a44e799621193a6d.pdf
- https://static.usrfiles.com/ugd/d1d005_1b92d2c2f7914613aa8c1f447fa271db.pdf
- https://static.usrfiles.com/ugd/e1d58f_d00b495fd9ea4b6e9094c7fb33eabfe8.pdf
- https://cdn.shopify.com/s/files/1/0432/7319/1588/files/lavirewukavosora.pdf
- https://cdn.shopify.com/s/files/1/0428/1381/6995/files/sarl_bodler_cvece_zla.pdf
- https://static.usrfiles.com/ugd/9ff9b8_e3bb57fcede84a5db0aaff266f8c97db.pdf
- https://static.usrfiles.com/ugd/cf79db_b5b687c7f37944459450cea91580dbe1.pdf
- https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
- https://static.usrfiles.com/ugd/299074_5095d82e0fd740d58406053643b16042.pdf
- https://static.usrfiles.com/ugd/b8c837_f4f11e4896fc4a759d74a2088397164e.pdf
- https://static.usrfiles.com/ugd/938c70_bb4380b00bf843419a5f0946a7552e86.pdf
- https://static.usrfiles.com/ugd/943725_3cd6632c47574d6cbdaceb45e55f8976.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/
- https://static.usrfiles.com/ugd/943725_3cd6632c47574d6

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000661d.bin` `75d9dd325fbb649572d9e9f0a51bcc9d10faa00b4fa282c19687d6167ef42ca1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x661D	5212 bytes
`font_01_sfnt_off000077dc.bin` `17669a7dd9176f5e7ab486102f2b4f8dcff3e58c63cc4d104328c1b8ae792724`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77DC	9972 bytes

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