PDF malware analysis — malicious · 3495deb2f87d08a9

MALICIOUS

PDF

45.8 KB Created: 2020-09-02 04:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2c30fc5990ca6a078dff12a99e87a326 SHA-1: 9216ae6388517eeb17856308a42ecd2826e8a7bd SHA-256: 3495deb2f87d08a9af27c04c93eb28eda70e4e5c53a79e415145e66cf1d3a99f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to mimic search results, directing users to a malicious redirector at `ttraff.com`. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including one to a known malicious redirector, supports this assessment. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection attack.

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.com/wix?keyword=linked+list+c+code+pdf
- https://static.usrfiles.com/ugd/856cea_e24b18a33e8d4a9d9437e32e70c12299.pdf
- https://static.usrfiles.com/ugd/5ad03d_e7690253170745c09cc66e42648bf0a9.pdf
- https://static.usrfiles.com/ugd/b8c837_f6a9e8a912694c90b04776d45c4eebdb.pdf
- https://static.usrfiles.com/ugd/b41a9a_2ca189b4d8134d18b86b2b7a471d3932.pdf
- https://cdn.shopify.com/s/files/1/0429/6821/9799/files/adriana_arydes_jardim_secreto.pdf
- https://static.usrfiles.com/ugd/d775a9_39abe560e4754142932d445f6e6e3657.pdf
- https://static.usrfiles.com/ugd/c0a468_edc0b0c1b5054e119e44cc46945187d7.pdf
- https://static.usrfiles.com/ugd/55cc32_d4a12678baad4b258d2f0af44f5ed9a5.pdf
- https://cdn.shopify.com/s/files/1/0429/2929/1427/files/68557070634.pdf
- https://cdn.shopify.com/s/files/1/0437/2283/4071/files/pinowasonavuzopezenox.pdf
- https://cdn.shopify.com/s/files/1/0430/6108/4322/files/payback_period_formula.pdf
- https://cdn.shopify.com/s/files/1/0433/3315/7014/files/accounting_principles_11th_edition_weygandt_free_download.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_off00006759.bin` `217f723fb5e4a0d2eddf282890ae3c501fc7fe2d8a61bc22812765b042a123b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6759	4848 bytes
`font_01_sfnt_off000077fa.bin` `0f307028418f679174b78a875e6dbdc52c68ecd0bbe53cd56904ce001672c298`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77FA	16336 bytes

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