PDF malware analysis — malicious · 8c43335e31a94e2c

MALICIOUS

PDF

39.2 KB Created: 2020-08-29 21:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fa8c74b93679aee3da7c276c29cf404f SHA-1: 4d86c49c03e00c2cd211ab404508526edfcc3813 SHA-256: 8c43335e31a94e2c72feedddb9f694ca1c31d8dd5d802bcfa3146e69a04bb5ae

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=polar+express+hot+chocolate'. Additionally, it features a mass of external PDF links, indicating a link farm designed to distribute malicious content or phish users. The ML classifier also 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.cc/wix?keyword=polar+express+hot+chocolate
- https://cdn.shopify.com/s/files/1/0432/2567/7982/files/tervishoiut_kodus_vimalused.pdf
- https://cdn.shopify.com/s/files/1/0463/2851/2672/files/mandalas_colorear_nios.pdf
- https://cdn.shopify.com/s/files/1/0437/4121/6917/files/kimefapifejujatejawamola.pdf
- https://cdn.shopify.com/s/files/1/0436/3563/8425/files/sepuzufaxinafelu.pdf
- https://cdn.shopify.com/s/files/1/0437/8856/6677/files/the_locket_1946.pdf
- https://static.usrfiles.com/ugd/b8c837_e656e865d02343d59efcb01f3a73f5f9.pdf
- https://static.usrfiles.com/ugd/227d0f_6deb6412c35a4ab5a5b7b9a57d8a0480.pdf
- https://static.usrfiles.com/ugd/b8c837_d5910a8b2efe4dafa99e18bd97a813a8.pdf
- https://static.usrfiles.com/ugd/23e9be_3eae9b78e9224cd599305ca20d9e369d.pdf
- https://static.usrfiles.com/ugd/b8c837_5b6ef798cb8945d88b24fc933ada41e6.pdf
- https://static.usrfiles.com/ugd/ca300b_4a752575d2f545879b0eb08df762d712.pdf
- https://static.usrfiles.com/ugd/b8c837_0d3cc17852454d7e8de1d08a46563404.pdf
- https://static.usrfiles.com/ugd/b8c837_0f676f4ff3d146058fef31fa5db7fc70.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_off00005caa.bin` `5ae123bd57e2d24accae3f37defa3168ef4cd48eb0e5da557ee46017186f3c0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CAA	5092 bytes
`font_01_sfnt_off00006df4.bin` `edaf012c21ee15ec9e5c0b053d47d60afeef77b0e9d5a7f8850597f8698fd6cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DF4	10052 bytes

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