PDF malware analysis — malicious · 5058b3376fcc9f49

MALICIOUS

PDF

44.4 KB Created: 2020-08-07 04:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a37f15415f0adc4a6aedb0999a2ccbec SHA-1: 2318c6509505c139829d3680bb0282d4b321052f SHA-256: 5058b3376fcc9f49d45d5416a0db78032182bab9db7ab63e6c52337ba08ec801

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as 'asco breast cancer guidelines 2020 pdf'. This link, `https://ttraff.cc/pify?keyword=asco+breast+cancer+guidelines+2020+pdf`, points to known malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used to obscure the malicious redirector. 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.cc/pify?keyword=asco+breast+cancer+guidelines+2020+pdf
- http://vimup.biancaking.ch/uploads/1/3/1/4/131409909/8859082.pdf
- http://files.afreedombooks.com/uploads/1/3/1/4/131483440/b23ba7d2b0.pdf
- http://files.homefromhomechildcarers.co.uk/uploads/1/3/1/6/131636692/3311653.pdf
- http://juxutof.makergirlz.org/uploads/1/3/0/8/130874457/duvalu.pdf
- http://files.greenislegardens.com/uploads/1/3/0/9/130969097/6627674.pdf
- https://cdn.shopify.com/s/files/1/0429/9027/2675/files/49944636553.pdf
- https://cdn.shopify.com/s/files/1/0431/8239/1451/files/nukujawafef.pdf
- https://cdn.shopify.com/s/files/1/0434/4276/5991/files/kosigekevanejozir.pdf
- https://cdn.shopify.com/s/files/1/0437/3302/4929/files/97832891701.pdf
- https://cdn.shopify.com/s/files/1/0428/5644/8156/files/tirukaxelapebafiwati.pdf
- https://cdn.shopify.com/s/files/1/0431/2032/8853/files/tufokulenavosoxev.pdf
- https://cdn.shopify.com/s/files/1/0436/7689/3334/files/56891381997.pdf
- https://cdn.shopify.com/s/files/1/0437/0992/3480/files/wozozepufakira.pdf
- https://cdn.shopify.com/s/files/1/0427/8976/5279/files/29574175526.pdf
- https://cdn.shopify.com/s/files/1/0429/5199/9637/files/legitanafaxevafagum.pdf
- https://cdn.shopify.com/s/files/1/0429/1733/1100/files/python_char_to_ascii.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.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_off00006fda.bin` `6e43181c4644939841f5041bd3d52d6024b0a042e19afb0b9e63de6a493e08c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FDA	5728 bytes
`font_01_sfnt_off00008363.bin` `8b5d5d1ba338eb2b7f7219cd847cc24995b8e4c73c210e321caa392d835fd8f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8363	9680 bytes

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