PDF malware analysis — malicious · 78a06f9ee5bdb6e3

MALICIOUS

PDF

48.5 KB Created: 2020-09-02 09:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 77cea144126b97c3cbabf808c7986902 SHA-1: 16e6645950b5e3f036d7ffe4500bb6c78e6c41b6 SHA-256: 78a06f9ee5bdb6e3ea4c56a39d7cedada1af31a04561dee81baa12fde92e2016

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=english+grammar+basics+in+tamil+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://static.usrfiles.com/ugd/33a2e4_94d3aa6e93b24ca388f261bd0100c8be.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the primary intent is to drive users to malicious infrastructure.

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=english+grammar+basics+in+tamil+pdf
- https://static.usrfiles.com/ugd/33a2e4_94d3aa6e93b24ca388f261bd0100c8be.pdf
- https://static.usrfiles.com/ugd/31593d_39070af22b344757b1e33e3ddc7ca229.pdf
- https://static.usrfiles.com/ugd/10e3af_2c9b18a71862459d99ed511b6fb0ef03.pdf
- https://static.usrfiles.com/ugd/b8c837_fcc8da8b0b3548758964f5857c024199.pdf
- https://static.usrfiles.com/ugd/d31907_f36fe2c881bd40f29e8d314e2278f448.pdf
- https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdf
- https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
- https://static.usrfiles.com/ugd/c345b0_7578062663e7472294483cecff4c503e.pdf
- https://static.usrfiles.com/ugd/e73fea_6e0d86e0454a4051b7137b8599d530a9.pdf
- https://static.usrfiles.com/ugd/b8c837_22fce6fc27c9450e922b808bbd7a702b.pdf
- https://static.usrfiles.com/ugd/f14cf6_25e8616fbf4a4433b275694736a1eb5b.pdf
- https://cdn.shopify.com/s/files/1/0429/7667/3946/files/gaxofej.pdf
- https://cdn.shopify.com/s/files/1/0427/9477/8791/files/99607912761.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdf
- https://cdn.shopify.com/s/files/1/0434/7104/4770/files/82307821367.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
`stream_004_off00007322.bin` `4b03a4edcb6d928f06769d4b9ca756887db0b2759caebfdfcc259911e1f82a98`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x7322	12496 bytes
`font_00_sfnt_off00006009.bin` `4176f4c879d3dfcc95811d3f3d7d058eced107aa2cfcef1bd8edb28d5ad736a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6009	5668 bytes
`font_02_sfnt_off00009279.bin` `7074d9daa3826c9e0706af11a98c7de0296206d9ec27392547beaf34a0f95618`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9279	9988 bytes

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