PDF malware analysis — malicious · cb888155ce9ed9e8

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 04:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8a27cc73e88ffaa7c3dbbe31a43dc38 SHA-1: 6f6946fb09e2b2afc00e17ea3c3b1060d108f2de SHA-256: cb888155ce9ed9e817b1507ba942711c8b1a5190d19ea3c622fcd513c3126516

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'surface area and volume of composite figures worksheet pdf', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=surface+area+and+volume+of+composite+figures+worksheet+pdf
- http://files.davesmithrants.com/uploads/1/3/0/8/130873783/7853301.pdf
- http://files.dmyoga.co.uk/uploads/1/3/1/3/131380083/tivek.pdf
- http://files.nakmachine.com/uploads/1/3/1/4/131406518/gomivuxadiba_zabiw_xateviji_wasalesu.pdf
- http://files.angeltouchbynursenclark.com/uploads/1/3/2/6/132695942/5197180.pdf
- https://cdn.shopify.com/s/files/1/0431/3258/4098/files/jugijagisaweg.pdf
- https://cdn.shopify.com/s/files/1/0434/5420/2013/files/cookie_clicker_infinite_cookies.pdf
- https://cdn.shopify.com/s/files/1/0429/2021/4681/files/depopadufu.pdf
- https://cdn.shopify.com/s/files/1/0432/0441/1556/files/dubabunotefesuzovitepite.pdf
- https://cdn.shopify.com/s/files/1/0432/8570/8968/files/verumarimimufesakivopi.pdf
- https://cdn.shopify.com/s/files/1/0452/6263/5168/files/back_pain_pregnancy_exercises.pdf
- https://cdn.shopify.com/s/files/1/0438/9902/7611/files/losubemifijokujeni.pdf
- https://cdn.shopify.com/s/files/1/0437/7142/9016/files/debukiluzarebejojubojeged.pdf
- https://cdn.shopify.com/s/files/1/0430/6354/1913/files/3558627195.pdf
- https://cdn.shopify.com/s/files/1/0428/5969/2198/files/gaxilufanoxeg.pdf
- https://cdn.shopify.com/s/files/1/0429/5137/7049/files/sunuxajonon.pdf
- https://cdn.shopify.com/s/files/1/0431/6980/8548/files/wobomumaremusolafe.pdf
- https://cdn.shopify.com/s/files/1/0440/7967/7590/files/x_carve_laser.pdf
- https://cdn.shopify.com/s/files/1/0437/7326/4030/files/retroarch_on_raspberry_pi.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_off00005f39.bin` `ecf23a24a7126fd68276c72b57c78f6bddfd88a26108b4a98be2507e6d15db97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F39	5888 bytes
`font_01_sfnt_off0000732a.bin` `28de57ca757b057146057ad2377b6e1da591ab19f5362191d62ca0edfe6fb5a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x732A	9860 bytes

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