PDF malware analysis — malicious · 2882332520d667aa

MALICIOUS

PDF

55.0 KB Created: 2020-08-21 21:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b6501b461dfb9e907aca6769ba6d875b SHA-1: 39f71defee6784a5dad7ffd6822184e9017f41cc SHA-256: 2882332520d667aa78695ddb7483e1327ef9884f92911f24200721ec59a50f82

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure at 'ttraff.com'. The document body text, though heavily obfuscated, contains the string 'Walloop pro apk 8. 3', suggesting a lure to download potentially malicious software. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=walloop+pro+apk+8.+3
- http://sogin.ballstonspaumchurch.org/uploads/1/3/1/6/131606343/47f5d21f99422d.pdf
- http://files.naroomaanglican.com/uploads/1/3/0/7/130739814/mipusa-xupovefa.pdf
- https://cdn.shopify.com/s/files/1/0434/2880/6806/files/mawajetesuwewuwefabifuxo.pdf
- https://cdn.shopify.com/s/files/1/0431/9110/7752/files/3533756466.pdf
- https://cdn.shopify.com/s/files/1/0440/0339/3694/files/elementary_principle_of_chemical_process.pdf
- https://cdn.shopify.com/s/files/1/0434/2156/5078/files/22263957632.pdf
- https://cdn.shopify.com/s/files/1/0430/9362/2935/files/58096448107.pdf
- https://cdn.shopify.com/s/files/1/0434/5213/7622/files/2pac_greatest_hits_rar.pdf
- https://cdn.shopify.com/s/files/1/0428/9780/1375/files/cardiomegalia_fisiopatologia.pdf
- https://cdn.shopify.com/s/files/1/0433/8316/0983/files/30461946788.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/
- https://cdn.shopify.com/s/files/1/0434/5213/7622/fil

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000650a.bin` `619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x650A	2880 bytes
`font_01_sfnt_off00006f48.bin` `98b33576336813ae52dc8bb4bf125330ac9ab44177a1d8bc4f4c0dd936da6f82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F48	5104 bytes
`font_02_sfnt_off000080bb.bin` `7f75ad570fde1cfe7e0bb9fcd22474b757f8f19828890a3063452e16cb258510`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80BB	1680 bytes
`font_03_sfnt_off0000890b.bin` `5eb50db8bc2a0a4b61809daa54fdf0d32f63e09dfe73ba177031f162ee37ff0e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x890B	15624 bytes
`font_04_sfnt_off0000b917.bin` `89d88174a6941e29d95412da3dc50f63e5666a45f2fca69c828f67d7ba3b84f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB917	16148 bytes

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