PDF malware analysis — malicious · 829ddebc5cc745e7

MALICIOUS

PDF

44.0 KB Created: 2020-09-05 09:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8d0a96ee819eb8da76ea49ad24b48b47 SHA-1: 2273884831e174325266414e2bd0a2087c438591 SHA-256: 829ddebc5cc745e76398dee94ae657b260ab74b8fd9fb6a8a104e66059e0683d

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains text related to 'word letter templates free' and includes the malicious URL, suggesting a lure to trick users into clicking. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents.

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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.club/wix?keyword=word+letter+templates+free
- https://static.usrfiles.com/ugd/625844_61957605180e428ea2114f1712d9a0ef.pdf
- https://static.usrfiles.com/ugd/b8c837_e32925c4c4944104ad021826a9565fad.pdf
- https://static.usrfiles.com/ugd/89064d_52d8130c7d4e4db28d48f060bb4195e7.pdf
- https://static.usrfiles.com/ugd/faa7ef_b5119f531be8422d8180f6061503e933.pdf
- https://static.usrfiles.com/ugd/0d2fda_25054f067b1944e5a8b79040fd83e859.pdf
- https://static.usrfiles.com/ugd/b8c837_04575e3c877248a19f699182ba6cc4b2.pdf
- https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
- https://static.usrfiles.com/ugd/0e2875_a5bcfc6381cb422bb111bae43df04535.pdf
- https://static.usrfiles.com/ugd/b8c837_1037790485224ff38018261402570516.pdf
- https://static.usrfiles.com/ugd/12daa7_107194cc405f47a2922562192259a3f8.pdf
- https://cdn.shopify.com/s/files/1/0448/9238/9531/files/50783908259.pdf
- https://cdn.shopify.com/s/files/1/0427/7728/0671/files/77430183935.pdf
- https://cdn.shopify.com/s/files/1/0438/6632/5157/files/vocales_y_consonantes.pdf
- https://cdn.shopify.com/s/files/1/0440/3780/0086/files/887426604.pdf
- https://cdn.shopify.com/s/files/1/0434/2022/1607/files/computer_programming_languages_free_download.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_off00006e76.bin` `f5230bd79e4b54e6293f9ba9b95e91b0be1d0e3aee574bd9e88fa13a96353b58`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E76	5200 bytes
`font_01_sfnt_off00008017.bin` `1d357b83d6fa0318f422bfcb1a0882b421fbc0dc07e5d08d48b37f62321a42b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8017	10332 bytes

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