PDF malware analysis — malicious · b50495581d0f41c5

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 02:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9c574d3a20a35942eacf30de9feaed79 SHA-1: de75f74709c9e2ef1b4aecc10cfef61f75901c9e SHA-256: b50495581d0f41c571cfa217dd33cd49f8e3da9c92cf5abab8c8467dac5dab66

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. This indicates a likely phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. No scripts were extracted from this sample.

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=against+method+peter+feyerabend+pdf
- http://files.lockersecure.com/uploads/1/3/0/8/130874254/61dc620.pdf
- http://jasaputap.mawuka.net/uploads/1/3/1/6/131607163/bomororog.pdf
- http://files.camilletownshend.com/uploads/1/3/0/8/130873794/xuzilibenujuri_dilawoz.pdf
- http://jerivav.rickwilliamsart.com/uploads/1/3/2/6/132680813/zupuzogubudozex.pdf
- https://cdn.shopify.com/s/files/1/0435/4431/4024/files/budepefonejugox.pdf
- https://cdn.shopify.com/s/files/1/0428/4219/4083/files/fubibujoraz.pdf
- https://cdn.shopify.com/s/files/1/0430/8143/3242/files/94290903807.pdf
- https://cdn.shopify.com/s/files/1/0431/8245/7000/files/23864476167.pdf
- https://cdn.shopify.com/s/files/1/0437/9197/4557/files/wufolozalulonolopulazi.pdf
- https://cdn.shopify.com/s/files/1/0440/0198/4662/files/ockham_s_razor_philosophy.pdf
- https://cdn.shopify.com/s/files/1/0431/7321/6411/files/lijogabezixaretewuf.pdf
- https://cdn.shopify.com/s/files/1/0430/6327/9767/files/90918238513.pdf
- https://cdn.shopify.com/s/files/1/0433/4449/4760/files/sojarisusale.pdf
- https://cdn.shopify.com/s/files/1/0427/4031/8375/files/pawubedopozebabukele.pdf
- https://cdn.shopify.com/s/files/1/0430/9378/6791/files/mastering_physics.pdf
- https://cdn.shopify.com/s/files/1/0434/8110/4541/files/fimume.pdf
- https://cdn.shopify.com/s/files/1/0433/3862/9270/files/60250663025.pdf
- https://cdn.shopify.com/s/files/1/0431/5371/9452/files/sopalexoma.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_off00007502.bin` `feec1f3789feb4849c67887667e35ea27a38835077cb7b745d7d85c4d9212d97`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7502	5652 bytes
`font_01_sfnt_off0000881a.bin` `167d116019d9a93d25144b40399912818ad88f6f3022e5f595955ad3fc53c3c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x881A	10052 bytes

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