PDF malware analysis — malicious · 5003bc0966561a63

MALICIOUS

PDF

39.7 KB Created: 2020-08-14 18:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 14a6ca4d93f210ceadbe8896f036c57c SHA-1: a61c6e5746a0d090842fd7ca87cd2381dd2fe062 SHA-256: 5003bc0966561a63b3c5b4260c20bbf8c43f88c7586fee48a7b8f64cea9297f5

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wb?keyword=ethiopian%20grade%207%20mathematics%20textbook%20pdf, which is also flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a chain of redirects, likely for phishing or malware distribution.

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/wb?keyword=ethiopian%20grade%207%20mathematics%20textbook%20pdf
- http://files.borderskirental.com/uploads/1/3/1/3/131380531/9850106.pdf
- http://monon.pcomproperty.com/uploads/1/3/2/6/132682694/jiropo.pdf
- http://files.steppingstonebully.org/uploads/1/3/0/7/130738765/golazekelasi.pdf
- https://cdn.shopify.com/s/files/1/0431/4795/2292/files/jivilutudiwunurudokak.pdf
- https://cdn.shopify.com/s/files/1/0433/3754/7929/files/dakamegogab.pdf
- https://cdn.shopify.com/s/files/1/0433/6844/8152/files/xekom.pdf
- https://cdn.shopify.com/s/files/1/0427/6033/9623/files/55280485884.pdf
- https://cdn.shopify.com/s/files/1/0428/8171/2287/files/jukawajowutelu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
- https://cdn.shopify.com/s/files/1/0435/5548/7905/files/vawaxexenosop.pdf
- https://cdn.shopify.com/s/files/1/0434/0056/0805/files/26038127000.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_off00005bde.bin` `91929259489aebee80e056fd04d0a59a7af24a3dd72428b945d0207588a72765`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5BDE	5848 bytes
`font_01_sfnt_off00006f9f.bin` `bae454aa0c3c2ce3cd39036ba84b45e1fec53b38b9f878a0ce13c1ee6d024702`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F9F	10140 bytes

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