PDF malware analysis — malicious · f514c14a05a05b76

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 08:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 164b59df795ae59404e0358169826694 SHA-1: 3c8e9ca298d7fe3b28739f3837ca2cdfce117e5b SHA-256: f514c14a05a05b768b3b40d8b55c901c2845f12769240980cab158f73f3e4e06

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.ru). The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector indicates an attempt to lure users to a harmful destination.

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.ru/pify?keyword=dl+tag+full+form+in+html
- http://files.thetrashtalkblog.com/uploads/1/3/1/4/131438532/260a7f.pdf
- http://files.radikes.com/uploads/1/3/2/3/132302982/nifoloxuvoduxa.pdf
- http://files.wickedladiesbeecompany.com/uploads/1/3/1/4/131406717/5192167.pdf
- http://files.bpesfoundation.org/uploads/1/3/0/7/130775635/pagokafexaxita.pdf
- https://cdn.shopify.com/s/files/1/0431/2183/6193/files/canadian_citizenship_application_minor.pdf
- https://cdn.shopify.com/s/files/1/0432/2105/7700/files/19746685619.pdf
- https://cdn.shopify.com/s/files/1/0430/9535/9637/files/high_earners_report.pdf
- https://cdn.shopify.com/s/files/1/0430/9526/1348/files/70778597223.pdf
- https://cdn.shopify.com/s/files/1/0434/8634/7417/files/cdmx_capital_social_uniformes_y_utiles_escolares.pdf
- https://cdn.shopify.com/s/files/1/0440/4104/4118/files/bewawawokimafufa.pdf
- https://cdn.shopify.com/s/files/1/0430/4610/9341/files/79264087560.pdf
- https://cdn.shopify.com/s/files/1/0429/2775/1321/files/68923979955.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_off00005553.bin` `ef5ae91dc3243b0b06244783a14bfdf16920bc05518b23ad1522a1966a282821`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5553	5000 bytes
`font_01_sfnt_off0000662a.bin` `a0a3311f84d277fd86595b1d2f7a3c8d9dbd1c0ec47aa2c624e52a2990d562c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x662A	14164 bytes

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