PDF malware analysis — malicious · a2000a4e31d0d62a

MALICIOUS

PDF

52.9 KB Created: 2020-08-18 16:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c2b47e88bf248a6cfc8f573bafe7aaf6 SHA-1: 135c65758399dfa3d2f94a236aff7fab0d1c9f99 SHA-256: a2000a4e31d0d62a0903892dcd0a424e646571a2c8957bf769396ffe0c5f9ec6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=sqlite+browser+windows'. This link is presented within the document body, likely as a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier 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.ru/pify?keyword=sqlite+browser+windows
- http://lefupel.mindsets.net/uploads/1/3/1/1/131164572/5961620.pdf
- http://files.carolgrice-curran.com/uploads/1/3/1/4/131407089/f46e45419816.pdf
- http://files.uniqueaudioconcept.com/uploads/1/3/2/6/132682802/dfae6d5c4.pdf
- https://cdn.shopify.com/s/files/1/0434/5066/3062/files/vojodovawup.pdf
- https://cdn.shopify.com/s/files/1/0430/8942/8637/files/anita_blake_micah.pdf
- https://cdn.shopify.com/s/files/1/0433/6700/6364/files/vampire_hunter_d_1985.pdf
- https://cdn.shopify.com/s/files/1/0431/6397/5842/files/zoxopulutovolemimur.pdf
- https://cdn.shopify.com/s/files/1/0431/5935/5558/files/gagivabaneg.pdf
- https://cdn.shopify.com/s/files/1/0432/9160/7190/files/60478368433.pdf
- https://cdn.shopify.com/s/files/1/0433/2729/1544/files/60267759601.pdf
- https://cdn.shopify.com/s/files/1/0431/7780/3931/files/statistical_significance_test.pdf
- https://cdn.shopify.com/s/files/1/0428/3708/2271/files/33024546219.pdf
- https://cdn.shopify.com/s/files/1/0428/5821/7631/files/bivoputosej.pdf
- https://cdn.shopify.com/s/files/1/0449/8430/3775/files/72105464049.pdf
- https://cdn.shopify.com/s/files/1/0428/0185/6668/files/jedzenie_po_angielsku_wiczenia_dla_dzieci.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_off00007a53.bin` `c28ec00116f01b1eae1f7bb60f8bfeef059c0dddfb1d116a373ad12921afabc8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A53	5068 bytes
`font_01_sfnt_off00008baa.bin` `1fd30803a44675e670812f9ad97eeefc8b1668dacd38b12d25a34dfcc04afa1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BAA	10964 bytes
`font_02_sfnt_off0000b0eb.bin` `a235935b7da1a3e0dfb4386fa22d70075346861adeac55da3f8f322ddd140fe5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0EB	16352 bytes

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