PDF malware analysis — malicious · 47be51756f4a9c21

MALICIOUS

PDF

53.8 KB Created: 2020-07-29 13:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c4021152136c9508ec8a5f20977fe2b4 SHA-1: 96574b6a206c5691b8715aca70718b81158dc14b SHA-256: 47be51756f4a9c219ec79baf12e4f1b8ee86f67358dced320149487cdf986448

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com. It also contains a PDF link farm heuristic, indicating a large number of external links. The document body, though heavily obfuscated, appears to be a lure related to an 'application letter for teacher deped pdf'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious 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.com/pify?keyword=application+letter+for+teacher+deped+pdf
- http://files.cconsultingsa.com/uploads/1/3/0/8/130815726/69d7be8fd.pdf
- http://files.drhartnell.com/uploads/1/3/0/8/130814475/jifut.pdf
- http://files.madkentadventure.com/uploads/1/3/1/3/131398406/tupuvufidimeka.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
- https://cdn.shopify.com/s/files/1/0428/7227/5103/files/6782264717.pdf
- https://cdn.shopify.com/s/files/1/0434/6436/0100/files/33973784048.pdf
- https://cdn.shopify.com/s/files/1/0431/9313/9364/files/balonaxejegowomov.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
- https://cdn.shopify.com/s/files/1/0437/3600/6817/files/bafinetojonidexubefikuw.pdf
- https://cdn.shopify.com/s/files/1/0433/9888/9621/files/16813792415.pdf
- https://cdn.shopify.com/s/files/1/0429/4157/9420/files/2754047427.pdf
- https://cdn.shopify.com/s/files/1/0430/9050/9973/files/jitufixevovoku.pdf
- https://cdn.shopify.com/s/files/1/0434/5249/8070/files/14202407689.pdf
- https://cdn.shopify.com/s/files/1/0433/9829/9813/files/23285563370.pdf
- https://cdn.shopify.com/s/files/1/0428/6667/1782/files/75434871422.pdf
- https://doi.org
- 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/
- https://cdn.shopify.com/s/files/1/0434/6436/0100

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000788f.bin` `fe2c103d77bda46a7b06268cddb8fcff97bf378ecd854971602e04a7806dbc2b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x788F	5172 bytes
`font_01_sfnt_off00008a6f.bin` `51fc721db029407da6637f9cba7b4eaf889e53edc35d13669726759f8319fe23`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A6F	4844 bytes
`font_02_sfnt_off00009acc.bin` `8a448221a70626563e1cfc6e7706855afb9ce03cb48820f5a4a603e02a6157b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9ACC	14716 bytes

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