PDF malware analysis — malicious · de7b461553328cde

MALICIOUS

PDF

51.8 KB Created: 2020-07-28 16:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 518903544ec8e6b0157d93199b87c990 SHA-1: 15e1f6572a5c0d810ef410b66dee941caabc7244 SHA-256: de7b461553328cde83fd6b5167fceeafa25639bcfb331ee3f25b53e0c5464622

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links points to a known malicious redirector, while others lead to a large collection of PDFs hosted on Shopify. The document body is heavily obfuscated and appears to be largely junk data, but the presence of the 'wkhtmltopdf' string suggests it was generated programmatically. The overall pattern suggests an attempt to leverage SEO or redirect users to malicious content.

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=mandolin+headstock+template
- http://files.evelynwalters.com/uploads/1/3/1/4/131454496/92686.pdf
- http://files.envirolawteachers.com/uploads/1/3/1/4/131437683/datudinezodawe-vuren-gifogi.pdf
- http://files.educationalroboticsreview.com/uploads/1/3/0/8/130873769/rifix-voveluxireveziz.pdf
- http://files.brianknightresearch.com/uploads/1/3/0/9/130969809/1a6420a.pdf
- http://files.brianknightresearch.com/uploads/1/3/0
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdf
- https://cdn.shopify.com/s/files/1/0430/9411/4465/files/zidumusumopebino.pdf
- https://cdn.shopify.com/s/files/1/0432/7679/6057/files/kigonulumekobudapiv.pdf
- https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jedezufita.pdf
- https://cdn.shopify.com/s/files/1/0431/9395/8560/files/jukububokem.pdf
- https://cdn.shopify.com/s/files/1/0428/0087/3631/files/65635097388.pdf
- https://cdn.shopify.com/s/files/1/0428/5018/9478/files/92646459271.pdf
- https://cdn.shopify.com/s/files/1/0428/0634/5895/files/92694211269.pdf
- https://cdn.shopify.com/s/files/1/0431/9654/7230/files/75530014000.pdf
- https://cdn.shopify.com/s/files/1/0432/7538/7043/files/fusufutakaraxexuruzu.pdf
- https://cdn.shopify.com/s/files/1/0429/7474/0639/files/wonorebax.pdf
- https://cdn.shopify.com/s/files/1/0429/2195/1391/files/fubojoresego.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.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_off00008d1c.bin` `1ef2d33584a7b7f0fe65bd08a56b6ce37a90d2aacd843aeed4dbdd575dcfc387`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D1C	5072 bytes
`font_01_sfnt_off00009e30.bin` `d751de35392042683fcbc7aa38e39897752d6c1c2123a1c6cd149e3a392a7da6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E30	10604 bytes

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