PDF malware analysis — malicious · a4f9bb453021f05b

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 21:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9e728785f282a93429a913ee31638c93 SHA-1: 89958a862c9fb9206f182a6e2b6552aca67d385c SHA-256: a4f9bb453021f05b42ae9614fe38dca78f7de96f38ebce30a23cfe3237a27a94

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a free printable envelope template. This link, 'https://ttraff.cc/wix?keyword=free+printable+envelope+template', is the primary indicator of malicious intent. The PDF also exhibits characteristics of a link farm, suggesting an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious verdict.

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=free+printable+envelope+template
- https://cdn.shopify.com/s/files/1/0454/7398/8774/files/animal_kingdom_worksheets_for_grade_4.pdf
- https://cdn.shopify.com/s/files/1/0433/4111/9653/files/ridufodowudesux.pdf
- https://cdn.shopify.com/s/files/1/0434/7576/3353/files/wekotebudowamukutegemas.pdf
- https://static.usrfiles.com/ugd/0fdb6d_32f6d5111ff6454e94f7c0b698f0f050.pdf
- https://static.usrfiles.com/ugd/93c935_54e4f5cb873545e588c7b8596267738e.pdf
- https://static.usrfiles.com/ugd/b8c837_e23c022d67d34e72a2dcc95ceb99c577.pdf
- https://static.usrfiles.com/ugd/b8c837_f139695ee2484889a870e9f9d6725a17.pdf
- https://static.usrfiles.com/ugd/7198c1_8f597d7d7a5f472d9d0a1d23094628c6.pdf
- https://static.usrfiles.com/ugd/a2d007_219f6bb84f8e4ddca14d29bce5ca7ae6.pdf
- https://static.usrfiles.com/ugd/510a18_7609f98482c244a3a14905a7e14f6a69.pdf
- https://static.usrfiles.com/ugd/33a2e4_f0784ab37f494614b3b3db1afa617026.pdf
- https://static.usrfiles.com/ugd/b8c837_ca933f4e887c48e6b0edae9a96fa7667.pdf
- https://static.usrfiles.com/ugd/b8c837_a81b69b956e5473c91c32c5a7c31e113.pdf
- https://static.usrfiles.com/ugd/b8c837_bebec2d79e4a49c6bd4768229736433d.pdf
- https://static.usrfiles.com/ugd/5926b4_d4eea46a7b65434c9cac3689789c9ac5.pdf
- https://static.usrfiles.com/ugd/b8c837_6fab0fb2f8284ee8a177317f2dddbf43.pdf
- https://static.usrfiles.com/ugd/90423f_a976e9defddf4e29b84d26503ddd0123.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_off00006126.bin` `77681d0087ee4052ac448c95c94fbc12a6b934884e7b9584c4265295a0a31f8a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6126	4940 bytes
`font_01_sfnt_off000071e6.bin` `5b893f346219c564351d28606ae58b6559d14f1a8d64575c05116b1fe46c3fc6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71E6	10172 bytes

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