PDF malware analysis — malicious · dbc1c449ead4ec8d

MALICIOUS

PDF

45.6 KB Created: 2020-08-14 16:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a6e314c52475ad437ed6ebfc63527e2f SHA-1: b2b33e7735a4559327b812fe98726fdba21a0fd6 SHA-256: dbc1c449ead4ec8de6988c1ae80f33cabb4e159aa92e05f3896e792cab628c20

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One of these links, 'https://ttraff.cc/pify?keyword=el+caballo+de+troya+5+pdf', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. 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.cc/pify?keyword=el+caballo+de+troya+5+pdf
- http://files.sportsindustryacademy.com/uploads/1/3/1/3/131380723/fcffce3e.pdf
- http://files.shipasapfreight.com/uploads/1/3/1/0/131071117/1a263.pdf
- http://files.smrcreativestudio.com/uploads/1/3/0/7/130776021/vanatojosirax_jufovizej_bonimuzepa_waxizur.pdf
- http://files.stlukes.net/uploads/1/3/0/7/130739996/nafaxo_bowogufona.pdf
- https://cdn.shopify.com/s/files/1/0438/1586/2434/files/melit.pdf
- https://cdn.shopify.com/s/files/1/0435/8648/6440/files/72983353196.pdf
- https://cdn.shopify.com/s/files/1/0440/1060/2661/files/kiwizufazaz.pdf
- https://cdn.shopify.com/s/files/1/0433/7254/4150/files/archimedes_law.pdf
- https://cdn.shopify.com/s/files/1/0436/8872/2587/files/rajugogabe.pdf
- https://cdn.shopify.com/s/files/1/0441/0654/7352/files/zidiwej.pdf
- https://cdn.shopify.com/s/files/1/0437/6353/1933/files/67234391404.pdf
- https://cdn.shopify.com/s/files/1/0428/3197/0471/files/tratamiento_candidiasis_hombre.pdf
- https://cdn.shopify.com/s/files/1/0437/9633/2705/files/adam_smith_economics_book.pdf
- https://cdn.shopify.com/s/files/1/0433/3197/7370/files/87274269399.pdf
- https://cdn.shopify.com/s/files/1/0433/3161/6923/files/69732935833.pdf
- https://cdn.shopify.com/s/files/1/0427/6633/6167/files/92451968835.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.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_off00006487.bin` `b6e5094adf16064121d3591c228fd61962206f777c43ecdfee6428a12668e702`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6487	4928 bytes
`font_01_sfnt_off00007563.bin` `1c89ccfa98e81630d2f2e9c420852274ff356439cd5c2d97b484555654422935`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7563	11216 bytes
`font_02_sfnt_off000099f2.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99F2	4324 bytes

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