PDF malware analysis — malicious · b5b0a23d453d6940

MALICIOUS

PDF

33.5 KB Created: 2020-08-09 16:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9bbc623cc71324d934c75bce894bbb1d SHA-1: c9c333021bfb940a3f6d834534d2a5e240ae7f2a SHA-256: b5b0a23d453d69408321eaba1c2299d68080a277802221ec2f4502294f671575

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to domains associated with link farms and redirectors. One such URL, https://ttraff.com/pify?keyword=bartkira+pdf+download, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=bartkira+pdf+download
- http://files.tucsonderbybrats.com/uploads/1/3/1/4/131438423/9d80143.pdf
- http://files.kecns.org/uploads/1/3/1/3/131383750/2ee864.pdf
- http://files.blacksheepstrong.com/uploads/1/3/1/6/131606186/5786388.pdf
- http://files.mrskatiejohns.com/uploads/1/3/1/8/131857284/jogujaxip.pdf
- http://pijuva.theressomethingaboutmaryfulton.com/uploads/1/3/1/6/131607063/8245699.pdf
- https://cdn.shopify.com/s/files/1/0432/3078/9800/files/atlanta_criteria_pancreatitis.pdf
- https://cdn.shopify.com/s/files/1/0432/9255/7462/files/puwinekowotobigaridedeko.pdf
- https://cdn.shopify.com/s/files/1/0431/5486/6333/files/rewezarudibexi.pdf
- https://cdn.shopify.com/s/files/1/0437/9761/0657/files/dunadojusezij.pdf
- https://cdn.shopify.com/s/files/1/0440/6539/0757/files/59042437086.pdf
- https://cdn.shopify.com/s/files/1/0434/7176/5664/files/nursing_care_plan_for_cellulitis.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdf
- https://cdn.shopify.com/s/files/1/0436/1850/0765/files/architectural_digest_france_2020.pdf
- https://cdn.shopify.com/s/files/1/0434/8212/0357/files/debajutedali.pdf
- https://cdn.shopify.com/s/files/1/0434/5213/7622/files/94069581289.pdf
- https://cdn.shopify.com/s/files/1/0433/4315/1272/files/xogumawasimugipawib.pdf
- https://cdn.shopify.com/s/files/1/0433/4993/4229/files/21960546346.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_off000046b9.bin` `94bf0eb75ec15565013691d5c22d820d4660166c92f02ee1c3b63d4cf75f476c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x46B9	5064 bytes
`font_01_sfnt_off00005818.bin` `8b013415b9aecd678f45c5f9c33a77f60d511f838e292328e6c9ecd503a63762`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5818	9780 bytes

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