PDF malware analysis — malicious · 764d5094592569ad

MALICIOUS

PDF

32.9 KB Created: 2020-08-31 07:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b3b7f06853df34cc8a10032f44664e6d SHA-1: 5df49db82efa71a3b31a05d7d4d702c145d53025 SHA-256: 764d5094592569ad7a122503f6d5e365e86cf593a83e786e5e5638d1b757a144

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, appears to contain the same malicious URL and several other URLs pointing to Shopify, likely as part of a link farm to improve SEO for malicious content. 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.ru/wix?keyword=macsimizer+tool+box+for+sale
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/3600/0931/files/xujixidemov.pdf
- https://cdn.shopify.com/s/files/1/0447/8841/6663/files/70476519745.pdf
- https://cdn.shopify.com/s/files/1/0433/8289/8840/files/apoderado_aduanal.pdf
- https://cdn.shopify.com/s/files/1/0431/2875/0234/files/sariwedewutokow.pdf
- https://cdn.shopify.com/s/files/1/0430/0180/7007/files/98036923376.pdf
- https://cdn.shopify.com/s/files/1/0429/9912/0033/files/33509184188.pdf
- https://cdn.shopify.com/s/files/1/0435/2894/5819/files/81807307709.pdf
- https://cdn.shopify.com/s/files/1/0430/5115/5609/files/agno3_nh3_formaldehyde.pdf
- https://cdn.shopify.com/s/files/1/0438/6599/7472/files/bidebituwisuw.pdf
- https://cdn.shopify.com/s/files/1/0429/8797/8905/files/mejuniluzobaba.pdf
- https://cdn.shopify.com/s/files/1/0437/9607/0549/files/58259348921.pdf
- https://cdn.shopify.com/s/files/1/0433/8771/5742/files/tenagaxoziv.pdf
- https://cdn.shopify.com/s/files/1/0429/7211/9193/files/27276548816.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004298.bin` `e8535d7ad6a6ec9af18e83369f4ecb68320a38692d88db6c6df9ec046e177048`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4298	5292 bytes
`font_01_sfnt_off00005491.bin` `79f73c025ad0885fa184dfb003836822d8aa95d46a01494e334c93de60fdb2d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5491	10080 bytes

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