PDF malware analysis — malicious · dcc55c661b11b394

MALICIOUS

PDF

44.9 KB Created: 2020-07-31 14:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9995220c4c5fb729b6a5dfca6c7e6289 SHA-1: d3a45cd2561adfba7cc8d6a07c16e4119a2c382c SHA-256: dcc55c661b11b3945cb44627f33bab877640359deb86f5adeb83fd711c1e7b15

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=como+hacer+un+aserradero+portatil+para+motosierra+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to PDF creation and potentially search engine optimization keywords, suggesting an attempt to lure users through deceptive content.

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/pify?keyword=como+hacer+un+aserradero+portatil+para+motosierra+pdf
- http://files.chriskernutt.com/uploads/1/3/1/4/131407918/fopekotobexezexum.pdf
- http://files.tamiekasmithphotography.com/uploads/1/3/2/6/132681970/2046510.pdf
- http://files.tutejalab.org/uploads/1/3/1/3/131379174/xejel_nulox_pegaratam_kugogawenofaje.pdf
- https://cdn.shopi
- https://cdn.shopify.com/s/files/1/0434/9778/3458/files/zenilepogopowe.pdf
- https://cdn.shopify.com/s/files/1/0432/8760/9497/files/fubozidusotenerate.pdf
- https://cdn.shopify.com/s/files/1/0434/2172/8919/files/24944245662.pdf
- https://cdn.shopify.com/s/files/1/0433/9862/7495/files/sosibemusuzipijotuk.pdf
- https://cdn.shopify.com/s/files/1/0432/7519/0422/files/motezowujena.pdf
- https://cdn.shopify.com/s/files/1/0434/8575/7606/files/xuxalotabefimibudaturefes.pdf
- https://cdn.shopify.com/s/files/1/0431/5509/5712/files/35774727139.pdf
- https://cdn.shopify.com/s/files/1/0431/3199/4280/files/88179579702.pdf
- https://cdn.shopify.com/s/files/1/0438/1097/9997/files/pudigenixipu.pdf
- https://cdn.shopify.com/s/files/1/0434/6131/2676/files/91515502999.pdf
- https://cdn.shopify.com/s/files/1/0430/8113/8343/files/5486879949.pdf
- https://cdn.shopify.com/s/files/1/0432/1440/5793/files/2287225914.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_off0000702b.bin` `ca782b392f23ab71a97d9ca2f0088f0e3d0562a1d645dbd786707f4f0af59f69`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x702B	5300 bytes
`font_01_sfnt_off00008207.bin` `b67c5c7fda421388abbc6e029de20e31fbaf02d55ccff8f4cca334c8e9eecc8f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8207	11120 bytes

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