PDF malware analysis — malicious · 8d3476f03bc7e334

MALICIOUS

PDF

41.2 KB Created: 2020-09-05 17:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d5050b5b3a8d40b3f88c5c93c4142982 SHA-1: 75fba60f53fd8a14edaeb2b0bf0e49a3af262d57 SHA-256: 8d3476f03bc7e334028c711efc339254aedb8641adf5854c6268f1a65b6f88b4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.club/pify?keyword=cyberpower+battery+backup+425va+manual', leads to a known malicious domain. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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.club/pify?keyword=cyberpower+battery+backup+425va+manual
- https://cdn.shopify.com/s/files/1/0435/6718/6079/files/separate_peace.pdf
- https://cdn.shopify.com/s/files/1/0462/2899/6247/files/inventory_management_template_free.pdf
- https://cdn.shopify.com/s/files/1/0429/5789/7882/files/here_you_come_again_sheet_music_free.pdf
- https://cdn.shopify.com/s/files/1/0435/3949/7112/files/nibuw.pdf
- https://cdn.shopify.com/s/files/1/0430/2631/7473/files/bajau_laut.pdf
- https://cdn.shopify.com/s/files/1/0436/5287/4390/files/dagasik.pdf
- https://cdn.shopify.com/s/files/1/0435/3576/1576/files/arduino_wifi_module.pdf
- https://static.usrfiles.com/ugd/0d2908_65da6d53c81b42dc978bce2e9a701fbb.pdf
- https://static.usrfiles.com/ugd/b85eb0_f61b3aa6d8b64ce4bafa64e5fa88836f.pdf
- https://static.usrfiles.com/ugd/3d7af5_fd4d65525efe4183a71c7c9deedd15a4.pdf
- https://static.usrfiles.com/ugd/338562_148768787f4a4aae9838686d4c34fd1d.pdf
- https://static.usrfiles.com/ugd/dc8a8e_17f0acf7a60d4a03bb3beea94ab80cb5.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_off00005e86.bin` `ecf38e01956ebd4c6f9444695ced838b3726192bfccd6c85c51f44c1a2bc233f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E86	5608 bytes
`font_01_sfnt_off000071ad.bin` `6e58c20d92826e59141baae41d4e6fda3c99aab99ca7f29e1a07890abe70518c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71AD	11392 bytes

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