PDF malware analysis — malicious · a663b5915adf099d

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 03:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: be99f038399fcc7e39a4b29298826374 SHA-1: 25b0fe8a8a2494ea3027624e48395a9d1e0af297 SHA-256: a663b5915adf099d169482e59da3706d2e6b64c0a0bb9c3b4b1c1cb3133554be

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/wix?keyword=some+nights+mp3+320kbps, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and numerous other PDF files hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt to drive traffic to the malicious site.

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/wix?keyword=some+nights+mp3+320kbps
- https://static.usrfiles.com/ugd/b8c837_40f97e0fbb804426817f6eb5bfaa3cf0.pdf
- https://static.usrfiles.com/ugd/b8c837_afdbcacafee24e1ba8b4138dd5587e7b.pdf
- https://static.usrfiles.com/ugd/b8c837_3b8570033c1c410996df5bb174229800.pdf
- https://static.usrfiles.com/ugd/b8c837_a6ddb78312ce49768f5daf9ceeee655e.pdf
- https://static.usrfiles.com/ugd/b8c837_fd7c160f596349d19e6286ef2866010e.pdf
- https://cdn.shopify.com/s/files/1/0437/3135/3761/files/88984783186.pdf
- https://cdn.shopify.com/s/files/1/0434/4581/3413/files/8159558873.pdf
- https://cdn.shopify.com/s/files/1/0428/5494/0828/files/momumikeruki.pdf
- https://cdn.shopify.com/s/files/1/0433/5314/5495/files/gawumulefivarunuduw.pdf
- https://cdn.shopify.com/s/files/1/0436/2646/3385/files/15044264054.pdf
- https://cdn.shopify.com/s/files/1/0434/9162/3077/files/oxford_bengali_to_english_dictionary.pdf
- https://cdn.shopify.com/s/files/1/0435/2658/6527/files/67051842156.pdf
- https://cdn.shopify.com/s/files/1/0429/7628/0729/files/diamond_one_touch_video_capture.pdf
- https://cdn.shopify.com/s/files/1/0462/6310/7738/files/50014445634.pdf
- https://cdn.shopify.com/s/files/1/0434/0318/2243/files/polega.pdf
- https://cdn.shopify.com/s/files/1/0429/5573/5193/files/canon_imageclass_mf3010_user_manual.pdf
- https://cdn.shopify.com/s/files/1/0461/0942/5828/files/rozafadoxatinapeto.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_off000050ee.bin` `3913ed0c30596a95adfca324dced1c9b9c23a57fb868dcbdc5fed3e6b5d75859`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x50EE	5640 bytes
`font_01_sfnt_off000063fd.bin` `0f9746d5471c3f51a071dfc04c2391739ba1e3e11c476d7f0676adaa2f410037`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63FD	10516 bytes

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