PDF malware analysis — malicious · dd9edb47f00440c9

MALICIOUS

PDF

32.5 KB Created: 2020-08-17 00:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b60efa8100cd7963f47a8959cfeb1435 SHA-1: 6b81325c57d4022475b95339ff215c6210086a8c SHA-256: dd9edb47f00440c974b098cbf45a76269e1ee2a8d73a6613e3773a9be1402852

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a "College Board PSAT Answer Key". The document body and heuristics indicate a lure to external content. The presence of numerous embedded links, many pointing to Shopify domains, suggests an attempt to obscure the malicious redirector or create a link farm. The ML classifier strongly flagged this PDF as malicious.

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=college+board+psat+answer+key
- http://files.dylanhurwitz.com/uploads/1/3/0/7/130739699/migizod-supurelejevibi.pdf
- http://files.nforchestra.org/uploads/1/3/1/8/131856129/bimudatujirivaviw.pdf
- http://raduk.ivyouthsymphony.org/uploads/1/3/2/7/132710507/9274150520b.pdf
- http://files.campmujigae.org/uploads/1/3/1/8/131871518/lutunasadelobu.pdf
- https://cdn.shopify.com/s/files/1/0431/5352/2850/files/30989919894.pdf
- https://cdn.shopify.com/s/files/1/0431/6043/6896/files/biology_miller_and_levine_chapter_2.pdf
- https://cdn.shopify.com/s/files/1/0437/7870/3511/files/95489191587.pdf
- https://cdn.shopify.com/s/files/1/0437/5435/6897/files/84982911390.pdf
- https://cdn.shopify.com/s/files/1/0437/4088/9240/files/32265159443.pdf
- https://cdn.shopify.com/s/files/1/0432/8246/4928/files/89998341767.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
- https://cdn.shopify.com/s/files/1/0445/9751/0308/files/33075561144.pdf
- https://cdn.shopify.com/s/files/1/0430/6288/6549/files/formula_of_maths_of_10th_class.pdf
- https://cdn.shopify.com/s/files/1/0433/4921/3349/files/assam_tet_exam_centre.pdf
- https://cdn.shopify.com/s/files/1/0435/9123/7791/files/operational_amplifier_and_linear_integrated_circuits.pdf
- https://cdn.shopify.com/s/files/1/0428/7237/3414/files/5442057435.pdf
- https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47406006068.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_off000044cd.bin` `731dc1110aaf59440878ef72b616f7c02409a33fe52eab78d50dccf574c46070`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44CD	5432 bytes
`font_01_sfnt_off0000576a.bin` `64b62adec33a8832f8a175c35d2d156d48e74320ad66ef390a6d69cbc4077d17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x576A	8756 bytes

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