PDF malware analysis — malicious · f3d4ac217794a349

MALICIOUS

PDF

67.5 KB Created: 2020-08-08 05:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: afa561801d21d73e8e44f308a6a6a690 SHA-1: cb4994714eb23ed30a22a95f2df38f5afc019d9d SHA-256: f3d4ac217794a34918d2013cb18eb1cc0a02e0a84e0096d05f21c4af235bda27

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to direct users to harmful content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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.cc/pify?keyword=calcium+homeostasis+pdf
- http://files.confessionsofanunderachiever.com/uploads/1/3/0/7/130740257/98061e9be39e.pdf
- http://files.imperialdancecompany.com/uploads/1/3/1/4/131409244/xabixugip.pdf
- http://files.ggrubberstamps.com/uploads/1/3/2/7/132710627/09b9beea.pdf
- https://cdn.shopify.com/s/files/1/0434/5639/7464/files/52667169453.pdf
- https://cdn.shopify.com/s/files/1/0428/3577/1558/files/complete_spring_framework_tutorial.pdf
- https://cdn.shopify.com/s/files/1/0437/5012/9813/files/xoxodakakilegusugituf.pdf
- https://cdn.shopify.com/s/files/1/0432/0192/1184/files/36275897781.pdf
- https://cdn.shopify.com/s/files/1/0429/9145/2314/files/rogalobuwegokevalijimadeb.pdf
- https://cdn.shopify.com/s/files/1/0433/2313/0009/files/zaladaberebozewutazimuv.pdf
- https://cdn.shopify.com/s/files/1/0431/7170/9092/files/zuros.pdf
- https://cdn.shopify.com/s/files/1/0433/4642/8059/files/sileta.pdf
- https://cdn.shopify.com/s/files/1/0436/3363/9584/files/wodojuminamunune.pdf
- https://cdn.shopify.com/s/files/1/0437/5930/4865/files/odysseyware_geometry_semester_2_answers.pdf
- https://cdn.shopify.com/s/files/1/0437/2286/6842/files/cannabinoides_endogenos.pdf
- https://cdn.shopify.com/s/files/1/0432/2469/4942/files/xevanataworor.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_off0000b313.bin` `0bf067dd0c18a2e5ea0700c57164daf1ec28a9a6fb724ed1361c73b3f2b9e991`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB313	5204 bytes
`font_01_sfnt_off0000c4a0.bin` `62ef49fa322eacad79b4ef00871934c1fe04f5e5ae5c964ea9a58500450b04ea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4A0	11768 bytes
`font_02_sfnt_off0000eb6e.bin` `100525de4ec19a892231ae9e500df077d17dce85b7aae2dba1a2f8913790d544`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB6E	16208 bytes

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