PDF malware analysis — malicious · 2c75eddd7dfddcca

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 08:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1bdd7096b53aee9d57cf5f4c389eb64a SHA-1: 5711483af735eb5d13a26e3031dbbfb08a43fa32 SHA-256: 2c75eddd7dfddcca40edf5ddbe7fd11f0e74f9a2d221e6be237d7eccd70a3040

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, identified as a link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other benign-looking PDFs, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=life+of+pi+in+hindi
- https://static.usrfiles.com/ugd/83e24f_ac62b628f9c74cff845bc934624e3260.pdf
- https://static.usrfiles.com/ugd/7ff653_2bab0c834f2e4027aa91e6bd310916cd.pdf
- https://static.usrfiles.com/ugd/97493d_dcde0119784949e1813663d0fc317c92.pdf
- https://static.usrfiles.com/ugd/d9d1f5_d74ff10399e84be080f056d6e895923e.pdf
- https://static.usrfiles.com/ugd/69b86f_2b0b39f4183b4e8996c639a32314f021.pdf
- https://static.usrfiles.com/ugd/e2c6c1_da4fe36139804533a3b3a6c737930aa9.pdf
- https://cdn.shopify.com/s/files/1/0440/7151/8373/files/pathfinder_ratfolk_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/0631/2098/files/84815457857.pdf
- https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdf
- https://static.usrfiles.com/ugd/b8c837_9109b88c05074a64ba9531a98d372619.pdf
- https://static.usrfiles.com/ugd/1be480_7ddf91d5e17b447c9e07b094ec3487b3.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_off000060b8.bin` `d93a6b21de230bb9e187c27508c955276b5f919316cbcc647d95b3edb55e19b2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60B8	4260 bytes
`font_01_sfnt_off00006f1c.bin` `f0f551c526e1108ce926e492a0bb36a677f972865f11ba9f50d4640fcc7b9f9b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F1C	10312 bytes
`font_02_sfnt_off0000922f.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x922F	4324 bytes

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