PDF malware analysis — malicious · d21355e017603fb8

MALICIOUS

PDF

40.5 KB Created: 2020-08-02 09:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bb8a6a8dd2363e61f6eaa7658079c907 SHA-1: 8217c363d87d5d228b608352ae0f443833aa5c3c SHA-256: d21355e017603fb863862187822014693b444bdbe363b629582349aec28cc0fd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm or SEO manipulation, embedding a large number of links to external PDF files. One of these links, https://ttraff.com/pify?keyword=ad%2526+d+2nd+edition+monstrous+compendium+pdf, is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring users to malicious infrastructure through these embedded links.

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=ad%2526+d+2nd+edition+monstrous+compendium+pdf
- http://files.simplybeautifulpg.ca/uploads/1/3/0/7/130740050/vonibomew.pdf
- http://files.uschessschool.com/uploads/1/3/1/3/131380894/811adf209e846.pdf
- http://files.rampensau.training/uploads/1/3/1/4/131409463/buzun.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
- https://cdn.shopify.com/s/files/1/0436/1935/2740/files/56091473271.pdf
- https://cdn.shopify.com/s/files/1/0431/7492/0347/files/sepix.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
- https://cdn.shopify.com/s/files/1/0431/8806/0321/files/min_to_seconds.pdf
- https://cdn.shopify.com/s/files/1/0430/3529/5905/files/46045460864.pdf
- https://cdn.shopify.com/s/files/1/0433/9240/1571/files/lamad.pdf
- https://cdn.shopify.com/s/files/1/0431/2816/0420/files/38862181646.pdf
- https://cdn.shopify.com/s/files/1/0437/2630/7480/files/faxitelit.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
- https://cdn.shopify.com/s/files/1/0429/3846/6467/files/18318941575.pdf
- https://cdn.shopify.com/s/files/1/0435/2039/3380/files/dna_amplification_techniques.pdf
- https://cdn.shopify.com/s/files/1/0429/5540/7511/files/josekareboloxa.pdf
- https://cdn.shopify.com/s/files/1/0431/8216/2084/files/banolegizemexuxitupibo.pdf
- https://cdn.shopify.com/s/files/1/0431/6135/4389/files/64488441421.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_off000064f0.bin` `5be54ff6fc51febc4311e10609cf5ee009aec6b64122ef758e69e2d515410c6e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64F0	4288 bytes
`font_01_sfnt_off00007388.bin` `d718b36c8b3016938932bb64de084bf19035ae8412f1279482ee56e22aeac792`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7388	10040 bytes

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