PDF malware analysis — malicious · 88faa145c10c0322

MALICIOUS

PDF

111.3 KB Created: 2020-08-19 08:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f980548c5bb11f790275e7df25f3ac16 SHA-1: 3978d92f652683cc960cdd5c52f1e7c0c2f18b0c SHA-256: 88faa145c10c03223657480317408c3c8cf6da465a2b3ff25ddf0b6317eaac46

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The embedded URL https://ttraff.ru/pify?keyword=how+to+use+dope+sheet+maya is the primary indicator of this malicious redirection. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent.

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=how+to+use+dope+sheet+maya
- http://files.sjaart.ca/uploads/1/3/1/3/131382595/2313353.pdf
- http://files.cranberryhobbit.com/uploads/1/3/1/3/131379894/ba21425f73e13.pdf
- http://files.simamartialarts.com/uploads/1/3/2/3/132303012/96d327f427f67.pdf
- http://ridafiwas.genesis-park.com/uploads/1/3/0/8/130874012/sonaxakalus.pdf
- https://cdn.shopify.com/s/files/1/0431/5843/8056/files/19746967784.pdf
- https://cdn.shopify.com/s/files/1/0438/7173/1880/files/pefuwefuzubaninivaw.pdf
- https://cdn.shopify.com/s/files/1/0431/1210/4103/files/actionscript_adobe_flash.pdf
- https://cdn.shopify.com/s/files/1/0430/8421/8521/files/57205641669.pdf
- https://cdn.shopify.com/s/files/1/0431/1678/9927/files/4585731140.pdf
- https://cdn.shopify.com/s/files/1/0432/7263/4533/files/febinugi.pdf
- https://cdn.shopify.com/s/files/1/0431/3972/7509/files/17222794194.pdf
- https://cdn.shopify.com/s/files/1/0434/8251/3561/files/sodium_bromide_msds.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_off000176de.bin` `f505111964750619e390fad3830d833a1b14ac9eef8e9c0d790f9c7a38cdf23c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x176DE	5228 bytes
`font_01_sfnt_off00018899.bin` `333e36eae6e12d5e2ab2a4ccb77e949a40d0f0049fed066cbe6ba33b3b53c2e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18899	12260 bytes

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