PDF malware analysis — malicious · ad9ad162b0de8ba7

MALICIOUS

PDF

52.5 KB Created: 2020-08-21 16:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: da459f687149fccb3728e24dc33def0f SHA-1: 8386f4792b4a21345d605ecad6196fbadefc314a SHA-256: ad9ad162b0de8ba7fd53a8743bfa3e2390340d00a8f8b3ee1168f2711ec26114

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous external links, one of which points to a malicious redirector. The document body contains the malicious URL, suggesting it is the primary lure.

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=4th+dimension+kanye
- http://files.chslibrary.info/uploads/1/3/2/7/132741241/ligoxogepexuw.pdf
- https://cdn.shopify.com/s/files/1/0433/2562/0374/files/2625204096.pdf
- https://cdn.shopify.com/s/files/1/0432/0103/6443/files/2675534779.pdf
- https://cdn.shopify.com/s/files/1/0439/8556/7902/files/buxinekidavekosuwanofatav.pdf
- https://cdn.shopify.com/s/files/1/0432/8259/6004/files/ditukiwovodevoxelelariku.pdf
- https://cdn.shopify.com/s/files/1/0430/4342/2359/files/bartlett_lake_az_fishing_report.pdf
- https://cdn.shopify.com/s/files/1/0432/6375/4408/files/zotusufegibela.pdf
- https://cdn.shopify.com/s/files/1/0429/1634/8057/files/fapitesujotuweludazemun.pdf
- https://cdn.shopify.com/s/files/1/0434/0423/0805/files/8301526171.pdf
- https://cdn.shopify.com/s/files/1/0435/6653/0719/files/vobamu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000081d0.bin` `4f5e135ae247c283113cf03d85ccb7c9ef5a2cd41829a5b3ebe7e77072ed5d2c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81D0	4884 bytes
`font_01_sfnt_off00009249.bin` `2d3aaec4975c5592612ce91f2f9cef16ef4d315d0ac1040ccee474329fbbef01`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9249	10876 bytes
`font_02_sfnt_off0000b719.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB719	4324 bytes

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