PDF malware analysis — malicious · 9b3d57056bd97d49

MALICIOUS

PDF

45.5 KB Created: 2020-09-03 00:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b60324e5a7eef37fcdd2e73a53d797e2 SHA-1: e33c675a5f6cc9e684c29f0dbc0f749f77abdb05 SHA-256: 9b3d57056bd97d4954a8d6172bdc7af3b38a521cda7f277b90acae48fb1a4b1a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also listed as a critical finding. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or malware distribution.

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.club/wix?keyword=phpspreadsheet+allowed+memory+size+exhausted
- https://static.usrfiles.com/ugd/d01287_cc8755da9d5646ff851903179c1346e6.pdf
- https://static.usrfiles.com/ugd/defdb4_110135ec57ed4da79dc3acefe9efc0e9.pdf
- https://static.usrfiles.com/ugd/50c35f_bf174a79a4e345e29a1df8fd532a6777.pdf
- https://static.usrfiles.com/ugd/dd4472_894898552b4945518e990942aa74ef7e.pdf
- https://static.usrfiles.com/ugd/74c34a_4064400bb442484cb1101e3703fdf541.pdf
- https://cdn.shopify.com/s/files/1/0428/6650/7943/files/gagekadu.pdf
- https://cdn.shopify.com/s/files/1/0430/3749/1357/files/mumojexologaxi.pdf
- https://cdn.shopify.com/s/files/1/0437/3748/1365/files/81632619393.pdf
- https://cdn.shopify.com/s/files/1/0434/7481/3090/files/79977373307.pdf
- https://cdn.shopify.com/s/files/1/0434/5017/1554/files/abu_dhabi_duty_free_prices.pdf
- https://cdn.shopify.com/s/files/1/0444/1568/0679/files/present_perfect_tense_worksheets_for_6th_grade.pdf
- https://cdn.shopify.com/s/files/1/0434/3015/0296/files/wipadegiwonaxujafagigi.pdf
- https://cdn.shopify.com/s/files/1/0432/1368/4891/files/job_application_cover_letter_template.pdf
- https://cdn.shopify.com/s/files/1/0438/4869/5958/files/precalculus_cohen_7th_edition_solutions.pdf
- https://cdn.shopify.com/s/files/1/0432/0549/2904/files/duwusurenawetadosoki.pdf
- https://static.usrfiles.com/ugd/a59130_80885ec820f34f4d993125678e730779.pdf
- https://static.usrfiles.com/ugd/aff7ca_555dc0e9876b46728fa0004a636560b5.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_off000067c2.bin` `a04a3928e98f5a3b50eda758e5d20fe8bc7ccfa4839771dda930a8a1580e4c76`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C2	5512 bytes
`font_01_sfnt_off00007a75.bin` `c0f337611e5caed52fa987de39221f1fe14d11cebbb2369721858ae4dd46b844`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A75	14684 bytes

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