PDF malware analysis — malicious · 20e59f8275bdfd7a

MALICIOUS

PDF

44.4 KB Created: 2020-08-09 19:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a810e8ae994be6ada16f827b733f0e22 SHA-1: 42afb9af9f6aaaeff39ddec6eb3144a7db6b0d85 SHA-256: 20e59f8275bdfd7abc93cfe4acaad33ae0509a22a7fb246602964c4b5c94ea1f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to music. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm for SEO manipulation or distribution. No scripts were extracted from this sample.

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.ru/pify?keyword=waltz+in+a+minor+chopin+pdf+piano
- http://files.mortlakeartshow.com.au/uploads/1/3/1/1/131163872/a30982817.pdf
- http://dusuluf.davisbaybc.com/uploads/1/3/2/8/132814930/jevosaputadomudutaxe.pdf
- http://files.wc911.com/uploads/1/3/2/6/132680784/zafalunoburol.pdf
- http://files.wickedladiesbeeco.com/uploads/1/3/2/6/132681586/2867730.pdf
- https://cdn.shopify.com/s/files/1/0432/3095/3630/files/64735395565.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
- https://cdn.shopify.com/s/files/1/0436/1306/1277/files/42817989933.pdf
- https://cdn.shopify.com/s/files/1/0432/1384/8731/files/punim.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdf
- https://cdn.shopify.com/s/files/1/0429/9459/8047/files/64195251110.pdf
- https://cdn.shopify.com/s/files/1/0437/1536/2984/files/broken_blade_of_heroes_vanilla.pdf
- https://cdn.shopify.com/s/files/1/0434/6337/7048/files/59099926457.pdf
- https://cdn.shopify.com/s/files/1/0428/7656/7711/files/peraturan_akreditasi_rumah_sakit.pdf
- https://cdn.shopify.com/s/files/1/0437/7349/3406/files/78786360660.pdf
- https://cdn.shopify.com/s/files/1/0434/4230/7239/files/atonia_uterina_2020.pdf
- https://cdn.shopify.com/s/files/1/0434/6318/0438/files/classification_of_vowels_and_consonants.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_off000055e2.bin` `33c2b4e3316c53261aaf7f9b16c0cc2dd9531c5832569dbb984c3a64f17cd85e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x55E2	5280 bytes
`font_01_sfnt_off000067c4.bin` `506680b440f8a54533902c2e4fc360bd961d5cbec05ac6db97d61d4919d33197`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C4	10204 bytes
`font_02_sfnt_off00008afd.bin` `a53240878560bec67b4a42c0fa3ec1d40d73cc0ecf111e3f548d47568884d1fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AFD	17268 bytes

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