PDF malware analysis — malicious · 6b6b6cdd72c25672

MALICIOUS

PDF

58.3 KB Created: 2020-08-01 15:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cc366b491b39bb94d9e061b3ed943d18 SHA-1: b8d0b94505f9dcca2a40f3f61ed21804feedcfe5 SHA-256: 6b6b6cdd72c25672da220a7950c3a5b5cd2da2f9807998e77ea828a0b5095e31

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm of numerous PDF files hosted on Shopify and other domains, with one primary link pointing to a known malicious redirector. This indicates a likely attempt to direct users to malicious content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=bdo+sorceress+build
- http://files.ishpeminghistory.org/uploads/1/3/2/6/132695302/2752984.pdf
- http://files.talltalesuf.com/uploads/1/3/2/8/132815872/3f4b47.pdf
- http://files.tinaophotography.com/uploads/1/3/1/4/131453805/bejas.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0435/4280/6680/files/54682419956.pdf
- https://cdn.shopify.com/s/files/1/0431/1141/5962/files/kukig.pdf
- https://cdn.shopify.com/s/files/1/0429/2280/3366/files/sazemajiwefejar.pdf
- https://cdn.shopify.com/s/files/1/0434/1514/2551/files/usb2_0_crw.pdf
- https://cdn.shopify.com/s/files/1/0435/2340/8023/files/41533434708.pdf
- https://cdn.shopify.com/s/files/1/0427/6623/7852/files/tepusetitekinado.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
- https://cdn.shopify.com/s/files/1/0436/5392/2981/files/kofipo.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tinoled.pdf
- https://cdn.shopify.com/s/files/1/0431/3228/9178/files/denamezokodiso.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000a82a.bin` `854d3ec8274e0ed988b1530d55bb913e199b37e8500340461688d33d8c648be8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA82A	4912 bytes
`font_01_sfnt_off0000b8ef.bin` `1aa420068e7b31abe1aecdd79004fb70733faace259ca93a3d3b002da19c71a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB8EF	10392 bytes

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