PDF malware analysis — malicious · 274b4dac0a670d8c

MALICIOUS

PDF

68.8 KB Created: 2020-08-29 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2623fdc75ceeb9c3b91a4278d5d77e58 SHA-1: a716d63c66edd5199404ee232f4e929d06916ecc SHA-256: 274b4dac0a670d8c20b50b11c2f12ef8a248e696582da7e44e2b0741131d1de6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link. The embedded URL points to 'ttraff.ru', which is known to host malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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=de+chica+de+chisme+on-line+2+episodi
- https://static.usrfiles.com/ugd/b8c837_a541db3b39ce40148e63eb2d5dc8aac7.pdf
- https://static.usrfiles.com/ugd/b8c837_590d85f9c2764883a46befadc1e87379.pdf
- https://static.usrfiles.com/ugd/b8c837_577d03c2bc6a44589703ca04f8528cd5.pdf
- https://static.usrfiles.com/ugd/b8c837_f2dd31e295c840e3af053e1176413e6c.pdf
- https://static.usrfiles.com/ugd/b8c837_a537ae959a0645fc88f83c3f9f9ff5cd.pdf
- https://static.usrfiles.com/ugd/b8c837_a832a50151e8428ca01710cdf281340c.pdf
- https://static.usrfiles.com/ugd/b8c837_2734c83abdf44af1a55532e2184037fa.pdf
- https://static.usrfiles.com/ugd/b8c837_c190b3b27dab4bada50a12c720818191.pdf
- https://cdn.shopify.com/s/files/1/0439/6944/6046/files/spring_framework_black_book.pdf
- https://cdn.shopify.com/s/files/1/0438/2251/4338/files/b_l_theraja.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b03c.bin` `79d24975cc7ae26d8cbb8bbf615f391f84ae6e88f84c9cce864af02bdcbbe650`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB03C	5380 bytes
`font_01_sfnt_off0000c269.bin` `e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC269	2044 bytes
`font_02_sfnt_off0000cbd6.bin` `a2f716507abc5b4a878afaed420e2054a7440fbd0d59b936ce5c7acef975d4f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBD6	10540 bytes
`font_03_sfnt_off0000f012.bin` `5cc0a098be3c3d69c1a29f38d290257ea6d3f8831ddb8973840f244c00047237`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF012	16256 bytes

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