PDF malware analysis — malicious · ad4b115d9d0251dc

MALICIOUS

PDF

41.5 KB Created: 2020-09-02 12:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ca6041f60b26ae50315f071b078ddb79 SHA-1: 71d7e8b58f1777eff6982262a63b1f89b1022e22 SHA-256: ad4b115d9d0251dc0b44482bdfb544f942fd9ed0fe76355f0094fe096561dc83

152 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.com. The document body, though heavily obfuscated, contains the same URL and keywords related to financial trading. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com, which is flagged as a redirector. The primary intent appears to be directing the user to the malicious ttraff.com URL.

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/pify?keyword=candlestick+chart+patterns+indicator+free
- https://static.usrfiles.com/ugd/ea9bdf_29640155223e4d2d9f499b7f732c5ba4.pdf
- https://static.usrfiles.com/ugd/a2ebd8_37f4a55d5b5241069aa1de571bd83472.pdf
- https://static.usrfiles.com/ugd/b8c837_d2e163d0ad8f4ade89c02e5fa1497de2.pdf
- https://static.usrfiles.com/ugd/a891c0_d9185d353cec43b0ab2ffa2ed6f0a438.pdf
- https://static.usrfiles.com/ugd/ea9bdf_4e6b83e4e75f44a0b01ce22a4b9d4c9d.pdf
- https://static.usrfiles.com/ugd/93971e_efb60022188f4711ba3ffa51289e3b4d.pdf
- https://static.usrfiles.com/ugd/c7a620_b552fd9895d64d759468012980be17ed.pdf
- https://cdn.shopify.com/s/files/1/0432/9252/4700/files/88703685624.pdf
- https://cdn.shopify.com/s/files/1/0432/2285/9944/files/best_application_for_reader_ipad.pdf
- https://cdn.shopify.com/s/files/1/0434/9673/4885/files/tonuwukimevitaradat.pdf
- https://cdn.shopify.com/s/files/1/0435/7816/3359/files/zerabumulo.pdf
- https://cdn.shopify.com/s/files/1/0434/3277/1750/files/kapiriba.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_off00005e10.bin` `4551419eac643c7580baecc5409cce860e3f7d3e6a5958a357f6f06ffb6ddb9c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E10	5212 bytes
`font_01_sfnt_off00006fbf.bin` `ed97485c834948790e52ef92911faa63c7bf392f0e5e5df61fbb749bba1e20a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FBF	13132 bytes

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