PDF malware analysis — malicious · 4257443ee489b635

MALICIOUS

PDF

39.3 KB Created: 2020-09-05 07:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2c6b3d4729f9fc5126a5269c4874e881 SHA-1: 9494dfedb07813c38e7cba8db3444ffa67a5395d SHA-256: 4257443ee489b635bbdbc317de588a93f86203966747da5beb1bdb76d7b33066

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDFs. One of these links, 'https://ttraff.link/pify?keyword=synaptics+touchpad+driver', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests a phishing or scam attempt, likely aiming to lure users to malicious content or exploit kits. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=synaptics+touchpad+driver
- https://cdn.shopify.com/s/files/1/0453/6303/6315/files/goleman_leadership_styles.pdf
- https://cdn.shopify.com/s/files/1/0428/8738/1155/files/sotewefukozu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
- https://static.usrfiles.com/ugd/9c43ec_e3bd4c41b6c24cb9982a24831d5779d2.pdf
- https://static.usrfiles.com/ugd/822ecd_78f6a3dbda574fa3b7ffebe0d08e62d9.pdf
- https://static.usrfiles.com/ugd/d2751c_febca45b2df24ef1bdf002a7cff2f1ef.pdf
- https://static.usrfiles.com/ugd/fedf23_f0d1c8f2ef194522a0a860df7056763a.pdf
- https://static.usrfiles.com/ugd/63022f_e40f5345d4fe4e49a2f23202b680fd76.pdf
- https://static.usrfiles.com/ugd/4e6dd5_6634adfb66f84dcbae26cd1c5520c558.pdf
- https://static.usrfiles.com/ugd/6f9b04_ed4bd301c6ae4e6a9b53827c33c1df90.pdf
- https://static.usrfiles.com/ugd/ee4d88_fcfe2ce53daf457794487270f70b9b8f.pdf
- https://static.usrfiles.com/ugd/003b86_ba2d6e0f20044c41a2d587dc87c7cfe9.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_off000051cd.bin` `27bd6ede5612b38de555b2a0221f9eb845cd74ca3f48256e2372be10a1b6421c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x51CD	5392 bytes
`font_01_sfnt_off00006424.bin` `ee197d729b239601c3b39e34f562db16082b0b5da84c285d30271b65b89f4930`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6424	14492 bytes

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