PDF malware analysis — malicious · 10988e757703c91c

MALICIOUS

PDF

49.8 KB Created: 2020-09-01 00:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5cd6ddeb562a7b55238e59d49f5e9677 SHA-1: afece6441b6423f1d426ff5ddc17f31abe25d823 SHA-256: 10988e757703c91c5beee0dd20e3562d9825ddf9502adc19a2065eec6f69cbd0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific URL that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into clicking it. 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=balkar+sidhu+song+phulkari
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/4c1554_db2003761a19433a9af9f2791883c4c7.pdf
- https://static.usrfiles.com/ugd/a86d68_76cbddd3730747ac973868ec2d07b646.pdf
- https://static.usrfiles.com/ugd/b8c837_a054bf630dbb487b9970bd36e6cc5104.pdf
- https://static.usrfiles.com/ugd/b8c837_48236be519ec4488b87f6924a41652a2.pdf
- https://cdn.shopify.com/s/files/1/0431/7229/8918/files/bojasagomo.pdf
- https://cdn.shopify.com/s/files/1/0430/9617/8845/files/watch_superman_vs_batman_online.pdf
- https://static.usrfiles.com/ugd/b8c837_155ba0f02f494e728781041923348362.pdf
- https://static.usrfiles.com/ugd/ee6770_cd105bf9d45e4e9ab8daccb72b262081.pdf
- https://cdn.shopify.com/s/files/1/0438/9673/3864/files/risoxodimujofuv.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0528/files/33036676091.pdf
- https://cdn.shopify.com/s/files/1/0431/2976/6045/files/62985216059.pdf
- https://cdn.shopify.com/s/files/1/0436/3950/5056/files/41390262920.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_off00008123.bin` `5a47777a6a90978c2e8a78372a98e543942a22a5b2cd94dae22107a740dbc53e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8123	5332 bytes
`font_01_sfnt_off00009342.bin` `79fa35e9d317bb9919b71ca72bd078915b0c887ab5375676f37ea8e816402675`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9342	11588 bytes

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