PDF malware analysis — malicious · df81680a63c33741

MALICIOUS

PDF

38.9 KB Created: 2020-08-29 21:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e2cb9274b7b731494697a0cd47088689 SHA-1: 1fb9054dc7b632f2f279a4eb2afe5589bcbe4b57 SHA-256: df81680a63c33741c4eb5b2336f53ad9980b994124ff06c5240a6244c2220d58

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, https://ttraff.cc/wix?keyword=ffxiii+lightning+returns+guide, points to a known malicious redirector. The document appears to be a link farm, with many URLs pointing to static.usrfiles.com, likely an attempt to obscure the true malicious intent by distributing links across multiple benign-looking domains. No scripts were extracted from this sample.

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=ffxiii+lightning+returns+guide
- https://static.usrfiles.com/ugd/b8c837_4ecdb13adb7c4b1888c2f9531758d173.pdf
- https://static.usrfiles.com/ugd/d78803_ad2d7d99868940849aa9acaad40ea8b1.pdf
- https://static.usrfiles.com/ugd/b8c837_84afb516428d45e69379c618e354cae9.pdf
- https://static.usrfiles.com/ugd/b8c837_2a6e593227de4e2e8719c2da2bdf19a4.pdf
- https://static.usrfiles.com/ugd/b8c837_87138a1d72a24928a626ab6d5ac58bec.pdf
- https://cdn.shopify.com/s/files/1/0433/7578/8184/files/51599014549.pdf
- https://cdn.shopify.com/s/files/1/0430/4922/2298/files/91760696159.pdf
- https://static.usrfiles.com/ugd/b7ed05_ceebc63c88444a1a8414485dce58f1f4.pdf
- https://static.usrfiles.com/ugd/b8c837_39b8b4365f7e4d7295fc93e10f219f40.pdf
- https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdf
- https://cdn.shopify.com/s/files/1/0434/3198/5309/files/xebufazevegodejivapufe.pdf
- https://cdn.shopify.com/s/files/1/0428/1591/4151/files/cantigas_de_amigo_caracteristicas.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_off00005a5b.bin` `7b49d8848c24f7b1c31765a469b913e331f49fe8182691557173900c6c535a65`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A5B	4984 bytes
`font_01_sfnt_off00006b4d.bin` `e0428c3082299ac3adf3d2f39895d1dc940596b55a182e967f77b37229c79c90`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B4D	10444 bytes

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