PDF malware analysis — malicious · f4794d5e63440124

MALICIOUS

PDF

36.2 KB Created: 2020-09-02 19:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e7bf08f33046e613f3a5af06bd148fcc SHA-1: 649de01f2cf4d90b55eef3e7047ee19b126502a6 SHA-256: f4794d5e634401246d5f2548ed147f3488ffd7c1e6e5e209e9ccc2c3431e4e54

154 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, pointing to 'ttraff.me'. This indicates the document is designed to lure users to a potentially harmful external site. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. 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.me/wix?keyword=moen+shower+faucet+installation+guide
- https://static.usrfiles.com/ugd/b8c837_0827ac60d8f445adb3d7860bebf65dfd.pdf
- https://static.usrfiles.com/ugd/b8c837_03f51cecd1f14850b602826146c68541.pdf
- https://static.usrfiles.com/ugd/ac72e0_0c536bba5fb7447f90b9a37f2fe6ba04.pdf
- https://cdn.shopify.com/s/files/1/0427/7207/0556/files/84643148062.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
- https://cdn.shopify.com/s/files/1/0432/4350/3783/files/18321947497.pdf
- https://cdn.shopify.com/s/files/1/0431/2760/3354/files/my_reputation_score.pdf
- https://cdn.shopify.com/s/files/1/0437/2742/1608/files/acceptable_forms_of_id_for_california_notary.pdf
- https://cdn.shopify.com/s/files/1/0462/3892/4960/files/77460093931.pdf
- https://cdn.shopify.com/s/files/1/0437/3784/1813/files/cardiac_anatomy.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_off00004485.bin` `625a6ab4d76492ffdbc78402cb26b1b7dbd211c2986df65dd99c5ef41a8be153`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4485	5260 bytes
`font_01_sfnt_off00005677.bin` `cd355c8a88da43d74eff77b941dfb8ea529d2921dd153a87666f9eec32c47fea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5677	9264 bytes
`font_02_sfnt_off000075f1.bin` `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75F1	4324 bytes

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